Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6239273269395b…

MALICIOUS

PDF

42.5 KB
MD5: 5f9510895657d8d77b14478e61461d41 SHA-1: 74b4c3bd92c0e184521b8816b674a564fd5d0f0e SHA-256: cf6239273269395b7ae42afe523089fef90820bfe93d651cc708323766a8bada
156 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' strongly indicates this PDF exploits a known vulnerability. The presence of an embedded script payload and an embedded file further supports this. The embedded file, 'embedded_file_obj0008.bin', is likely the delivered payload. The document body content appears to be obfuscated script fragments rather than user-readable text, suggesting the exploit is directly triggered.

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
c1676c37b8e09cd1e1c4ae6d4b7a9003acbbf47dd80e73b1a5885f8307289be6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42751 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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