Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7f6d6966af37ed…

MALICIOUS

PDF

42.7 KB
MD5: f6c1421fed3855c4f1afb9649ab75f75 SHA-1: 822ef4e58ac28b8482a5df3b43152cd1655720af SHA-256: 9f7f6d6966af37eddc295761a23b3bac8a6903b512144fd6f9d28210f1154f97
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection and ML classifier flagging strongly indicate malicious intent. The PDF contains an embedded script payload, which is a common technique for delivering exploits. The embedded file, also detected by ClamAV, likely contains the secondary stage of the attack. The specific ClamAV signature 'Pdf.Exploit.Agent-36830' is a key indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
55d077037a159f32ff94f2c807472eb80aa9e60d98e900caba3f8836373a4482		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42957 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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