EC-Council Computer Hacking Forensic Investigator CHFI v11 312-49 Exam Questions

Answer : B

According to the CHFI v11 objectives under File Type Analysis and Malware Forensics, understanding the internal structure of a PDF file is critical when investigating malicious documents. A standard PDF file consists of four main components: Header, Body, Cross-reference table (xref), and Trailer (Footer). Among these, the cross-reference table (xref table) plays a pivotal forensic role.

The xref table contains byte offsets for every object stored in the PDF file, allowing the PDF reader---and forensic investigators---to locate objects directly without reading the entire file sequentially. This enables random access to objects such as text streams, images, embedded files, JavaScript, and form objects. Additionally, the xref table supports incremental updates, a mechanism frequently abused by attackers to append malicious content to a legitimate PDF without altering the original data. By analyzing multiple xref sections, investigators can identify document revisions, hidden objects, and malicious insertions.

The Header (Option A) only specifies the PDF version, the Body (Option C) contains the actual objects, and the Footer/Trailer (Option D) points to the xref table but does not provide object indexing itself.

CHFI v11 explicitly emphasizes xref table analysis when examining suspicious PDF documents, as it is essential for detecting embedded malware, tracing document modifications, and reconstructing attack timelines. Therefore, the cross-reference table (xref table) is the correct and exam-aligned answer

Answer : D

Option D is the most useful answer because it provides the clearest indication that the activity may be part of a larger security issue rather than just routine login failures or missing-file requests. A mod_security entry showing that a rule was triggered for a possible SQL injection attempt directly suggests malicious web-application attack behavior and points to a broader intrusion pattern.

Option C is useful for confirming failed authentication activity, but by itself it may still reflect simple credential guessing or user error. Option B only shows a missing file request, which could be benign or accidental. Option A is the least suspicious of the choices. By contrast, an application firewall or security module explicitly flagging a possible SQL injection attempt strongly indicates that the server may be under targeted attack and that the failed logins could be part of a coordinated campaign.

From a CHFI perspective, log entries that directly indicate known attack techniques are especially valuable during web-server investigations. Therefore, the Apache log entry most likely to help David determine that the failed attempts were tied to a larger security problem is the mod_security alert for possible SQL injection.

Answer : D

Option D is the correct answer because CHFI v11 places major emphasis on rules of evidence, seeking consent, obtaining a warrant for search and seizure, legal issues, privacy issues and legal compliance, and the role of local/international agencies during cybercrime investigation. In a case involving multiple jurisdictions, cross-border systems, and lack of client consent, the investigator's first duty is to ensure the evidence-gathering process is legally valid in every relevant jurisdiction.

Working closely with legal counsel is essential because improper access can compromise admissibility, violate privacy laws, and expose the firm to legal liability. CHFI also highlights best practices for handling digital evidence, preserving evidence, and the importance of lawful authority before conducting intrusive forensic activity.

Option A is too limited and may ignore critical evidence. B would violate legal procedures. C is clearly improper because ownership claims do not override consent, privacy, or jurisdictional requirements. Therefore, the most defensible and CHFI-aligned initial approach is to coordinate with the legal team, understand each legal regime, and obtain the necessary warrants or permissions before proceeding.

Answer : B

This question maps directly to CHFI v11 objectives under Mobile and IoT Forensics and Tools for IoT Device Forensics. IoT investigations often involve heterogeneous devices with different operating systems, storage mechanisms, and acquisition challenges. CHFI v11 emphasizes the need for specialized forensic tools that support both logical and physical extraction, including advanced techniques such as chip-off and SD card analysis, to ensure comprehensive evidence collection.

MD-NEXT is a purpose-built digital forensic tool designed for mobile and IoT investigations. It supports forensic acquisition and analysis across a wide range of platforms, including Android, iOS, Tizen OS, wearables, drones, smart TVs, and removable media. Importantly, MD-NEXT provides capabilities for logical extraction, physical imaging, file system parsing, and chip-off memory analysis, which are critical when dealing with damaged, locked, or non-standard IoT devices.

The other options are not suitable for this scenario. DoubleSpace is a disk compression utility, EpochConverter is used for timestamp conversion, and Systemctl is a Linux service management command. None provide forensic acquisition capabilities. Therefore, MD-NEXT is the most suitable and CHFI v11--aligned tool for comprehensive IoT and mobile device forensic investigations.

Answer : D

Option D. GLBA is the correct answer. The Gramm-Leach-Bliley Act (GLBA) is the U.S. law enacted in 1999 that requires financial institutions to explain their information-sharing practices and protect sensitive customer data through safeguards. That description matches the scenario exactly. Within CHFI v11, legal awareness is a core competency: the blueprint includes legal issues, privacy issues and legal compliance, other laws that may influence computer forensics, and rules tied to the admissibility and handling of digital evidence.

The other options do not fit the facts. GDPR is a European data protection regulation, not a 1999 U.S. financial law. HIPAA governs protected health information in the healthcare sector. PCI DSS is an industry security standard for payment card data, not a law enacted in 1999 requiring disclosure of information-sharing practices. Because the company is a financial institution and the question highlights both privacy notice and safeguarding customer information, GLBA is the only answer that fully matches the scenario.

From a CHFI perspective, recognizing applicable legal frameworks is important because investigators and compliance personnel must understand which laws govern digital evidence, privacy obligations, and organizational handling of sensitive information.

Answer : C

The correct answer is C because the scenario highlights the integration of forensic activity into the organization's broader incident response and business recovery process. CHFI v11 specifically includes forensic readiness and business continuity, computer forensics as part of the incident response plan, overview of incident response process flow, and forensic readiness planning and procedures. Those blueprint areas are all reflected here. The organization is not merely restoring backups or training staff; it has already designed a process in which evidence collection, external coordination, and restoration can happen together without undermining recovery. That is the essence of incident response integration in a forensic context. Data backups are part of the story, but the core concept is the coordinated incorporation of evidence handling into operational response. Training and drills support readiness, but they are not the primary concept demonstrated in the active scenario. In CHFI-style reasoning, when forensic collection is deliberately embedded within response and continuity actions so the business can recover while preserving evidence, the best answer is incident response integration.

Answer : B

The correct answer is B because com.apple.recentitems.plist is the user-level preference artifact associated with recently used items and application-related recent activity in macOS. Community and forensic references identify this plist in the user's Preferences directory as storing recent-items information that can support timeline reconstruction of user activity. This makes it the best fit when the investigator wants a user-specific plist that reflects application usage around a suspicious time window. Application Support is a directory rather than the specific plist artifact being asked for. com.apple.desktop.plist and com.apple.dock.plist may contain useful configuration or interface state, but they are not the most directly relevant source for recent-item style application usage. CHFI v11 includes macOS forensic data, log files, and directories, so candidates are expected to know where user-activity artifacts reside inside the home profile. Since the question explicitly points to ~/Library/Preferences and asks for the plist that records usage relevant to recent activity, com.apple.recentitems.plist is the most appropriate answer.