Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e8273ae7287d21…

MALICIOUS

PDF

42.3 KB
MD5: 1354c54902ce3ddfcbc3a6ffa23548df SHA-1: 03f8dfefc79b20d9269ad957792b639180ce6bbf SHA-256: f3e8273ae7287d2109b739efe8ab7abf47484e9d0dba91df8629d6a98c110367
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics, including ClamAV detection (Pdf.Exploit.Agent-36830) and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded script payload and an embedded file further supports this assessment. While the specific exploit or payload is not detailed, the overall pattern suggests a typical PDF-based exploit delivery mechanism.

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
a344ed6bfdafa4125f28ffc7b9cde7172d37c345cd08d76b184011155cc6149a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42520 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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