Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c931e7231c3670…

MALICIOUS

PDF

28.3 KB
MD5: fbf77143ab10753a90c70f7edcec79aa SHA-1: e70b463d2cb7f7d66e12ac755fb66020f5416e5c SHA-256: 19c931e7231c36700a1b6e0ecaab832999ead0c58f8164f1809b78bcefc13c68
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains XFA form elements and embedded JavaScript, as indicated by the PDF_XFA heuristic and the ML_NYX_PDF_MALICIOUS classifier. ClamAV also detected it as Js.Exploit.HTML-30. The embedded script, when deobfuscated, appears to be JavaScript designed to be executed within the PDF context, likely to exploit a vulnerability and download a secondary payload. The embedded URL is likely related to the exploit or payload delivery.

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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