Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b343a42eaeeff23…

MALICIOUS

PDF

28.2 KB
MD5: da2d42aefec502ea0514be613cebd5c3 SHA-1: 516de93c1977919558ed53f94f3c633ef69e4fb0 SHA-256: 3b343a42eaeeff234752bf811c2a9454bf130fe1772a3ce8bf56c68d43e61551
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identifying it as a JavaScript exploit. The presence of an XFA form and an embedded URL further supports this. The script logic appears to be obfuscated, but the overall intent is to execute malicious JavaScript, 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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