Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0ccea639c86b24…

MALICIOUS

PDF

28.2 KB
MD5: cee443b86816c3a77bab2291161d087b SHA-1: 6937d2489fe7518c62dc241065a9def568415629 SHA-256: 5c0ccea639c86b2425b87b34583acc1d106ea45ecbc6269cd70fa7bd68554ad3
102 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to exploits. ClamAV detected this as Js.Exploit.HTML-30, indicating a JavaScript exploit embedded within the XFA form. The embedded URL, though seemingly benign, is part of the exploit structure. The ML classifier strongly flagged this PDF as malicious, supporting the exploit-based attack pattern.

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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