Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80c2d5d621e54fd…

MALICIOUS

PDF

42.9 KB
MD5: 3e02325232e8942ca4e6479ed5677b61 SHA-1: 1168526ec0ce35257afd123781e6cf575d1778af SHA-256: c80c2d5d621e54fd78bcdd6628c2e44fd00cfe6fe257ffda76607e9844281574
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains an exploit. Heuristics confirm the presence of an embedded script payload and an embedded file, which are common delivery mechanisms for exploits. The embedded script is heavily obfuscated, making its exact function difficult to determine, but it is likely responsible for executing the exploit and downloading a second-stage payload. The confidence is reduced due to the obfuscated nature of the script.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
a03ab92fc6a40ad9e21bcd774f13dc5f7c61bc71f0865c2e162280d927d597aa		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43204 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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