Malicious PDF — malware analysis report

Static analysis result for SHA-256 729029534bb1feae…

MALICIOUS

PDF

28.7 KB
MD5: 9785b391934a50d93251e38bb3b3ed57 SHA-1: e8e7cf75bca5eddc9c3545fe5c1023deb174a7eb SHA-256: 729029534bb1feae4860cb34e3f39ad1d9c5a2407803cbe963bf685eea0b764f
102 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as Js.Exploit.HTML-30. It utilizes XFA forms, a known vector for exploiting PDF vulnerabilities. The embedded JavaScript, though obfuscated, likely attempts to download and execute a secondary payload from the provided URL, aligning with common dropper functionalities.

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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