Malicious PDF — malware analysis report

Static analysis result for SHA-256 15259f365dc11efd…

MALICIOUS

PDF

28.3 KB
MD5: 2c9ed5af4a3ad94c07266c11c64f6fad SHA-1: 641169fec5a2d6deae01680c3441f726b0fb883e SHA-256: 15259f365dc11efd83de293be828b756e57a0fb57ae88b16676672aeb8ac5f56
102 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically detecting embedded JavaScript exploits. The presence of XFA form elements and embedded JavaScript strongly suggests an attack pattern aimed at exploiting client-side vulnerabilities. The embedded URL, while seemingly benign, is part of the XFA structure and may be used in conjunction with the exploit.

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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