Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ff1164e528e83e…

MALICIOUS

PDF

82.6 KB
MD5: fde54ab035d2b515cd25277d5569ac7a SHA-1: ca9abd4dbe6dc3166aff4eb381b493a52acfd288 SHA-256: c6ff1164e528e83ea5fd426d4da231f6909a95543ad2934764e5b7e9c8bd7b83
178 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-severity heuristics, including ClamAV detections for 'Pdf.Exploit.Agent-6136306-0' and an extracted artifact. The presence of an XFA form and an embedded script payload indicates a likely exploit attempt. The ML classifier also strongly indicated maliciousness. The embedded URLs are related to Adobe XFA and do not appear to be malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
fa8885f877dea44316872140f306b592d3483b8d7c9d7749f553d7e508a66a65		 pdf-embedded-script PDF raw stream script payload at offset 0x246 83837 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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