PDFex — PDF malware analysis

Static analysis result for SHA-256 9a89046d2f320622…

MALICIOUS

PDF

3.5 KB Created: 2007-10-16 06:43:14 +03:00 Authoring application: ⁇⁳⁴⁩⁣⁥†⁐⁄⁆⁴⁩⁴†⁖′‮‰′
MD5: 0d08a15627b4bf63540e5b10bf2f5792 SHA-1: bad8f637f609efdf56e80acb2a16aad4c211019b SHA-256: 9a89046d2f320622d651e77e02b2ee0950449a63f093e66322e3c86a93f320ca
140 Risk Score

Malware Insights

PDFex · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF file was flagged by ClamAV as Win.Trojan.PDFex-2 and a machine learning classifier. Heuristics indicate a dangerous URI command referencing the Windows command interpreter and attempting to execute calc.exe. The embedded URI 'mailto:tttt%../../../../../../../../windows/system32/calc.exe".cmd' strongly suggests an attempt to exploit a PDF vulnerability to achieve arbitrary command execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9659

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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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