PDFex — PDF malware analysis

Static analysis result for SHA-256 9f7f1cd96c154698…

MALICIOUS

PDF

8.7 KB Created: 2007-10-16 06:43:14 +03:00
MD5: 2854ef41f2023b1fe29cdbf98b1487a5 SHA-1: dfef883633611c698b06ba5e752c6c8e2a86994d SHA-256: 9f7f1cd96c154698f413b038705f17fa924f7f9d8bd4c398e0c44d951cdf47cd
138 Risk Score

Malware Insights

PDFex · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.003 Command and Scripting Interpreter: Windows Command Shell

The sample is a PDF file flagged by multiple high-severity heuristics, including PDF_DANGEROUS_URI_COMMAND and ML_NYX_PDF_MALICIOUS, and is detected as Win.Trojan.PDFex-2 by ClamAV. The critical heuristic indicates the PDF URI references a command interpreter path, specifically 'mailto:test%../../../../../../../../windows/system32/calc.exe".cmd'. This suggests the document is designed to exploit a PDF vulnerability to execute the Windows command interpreter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9497

Heuristics 4

  • ClamAV: Win.Trojan.PDFex-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.PDFex-2
  • PDF URI references command interpreter path high PDF_DANGEROUS_URI_COMMAND
    PDF contains a /URI action whose target uses a mailto/path traversal shape and references a command interpreter or scripting host. This is not a normal web link and matches legacy PDF command execution/dropper lures.
  • External URI low PDF_URI
    PDF contains an external URL action
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

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