Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e37c5cd09e40ef7…

MALICIOUS

PDF

42.5 KB
MD5: d3ef734df75ffb9877c126d0ff900166 SHA-1: 07d4fcb8acbc2a7b4e65a4eefc2ab485a79d0f46 SHA-256: 7e37c5cd09e40ef77061c57833eeb6dd71efade47b98d5fe34a9e71c15e4ce87
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically detecting an embedded script payload and an embedded file. The presence of XFA forms and embedded content suggests an exploit is likely being used to deliver a secondary payload. The embedded URLs, while not directly malicious, are associated with the PDF structure.

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
06458dfa2791a4ff4c96381816aabe671251c3abbfd53fd3dbd6e1992d35a263		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42734 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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