Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1cf2adf8395724…

MALICIOUS

PDF

42.7 KB
MD5: 38397639df873bfa0c16006c3b584654 SHA-1: 11ce2dfecef5c9bea737783d887f85878e0eae6a SHA-256: 1e1cf2adf8395724534a9c2fe1212a327a21743297b7199c8935e77958a5bd86
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 document body content is highly obfuscated and appears to be part of the exploit mechanism rather than user-facing text.

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
64d9ca8ae14824cbcc860d3971cedec7f1846fe3aa6504c31de6a189fb521c97		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42960 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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