Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c53adb62428535b…

MALICIOUS

PDF

28.2 KB
MD5: 60eb246379a79a8114d9cfe860d89ac6 SHA-1: e5b380f8a7810c8db55bd1b078293ea7bc010026 SHA-256: 6c53adb62428535b55e820ee62eb85d67a4d45b3cf42af102d880cd21fd60ea1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically detecting JavaScript exploits within XFA forms. The embedded URL, while seemingly benign, is part of the XFA structure which is known to be exploited. The presence of JavaScript and the XFA exploit indicates the file attempts to execute malicious code, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.xfa.org/schema/xfa-template/2.5/

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