Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f7c84c3aa750f8…

MALICIOUS

PDF

28.1 KB
MD5: 60f2232cfa1fb45cdcdd95311689da16 SHA-1: fd4759dfd9e33397ba195c9c08ea798c8e91a6b0 SHA-256: 79f7c84c3aa750f8b1f7c1ae789324fe80f1a7aa93c0ddb1f97772fe96474f6b
100 Risk Score

Malware Insights

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

The PDF sample contains XFA form elements and embedded JavaScript, as indicated by the PDF_XFA heuristic and the CLAMAV_DETECTION rule (Js.Exploit.HTML-30). The JavaScript code appears to be obfuscated but is designed to execute, likely downloading a secondary payload from the embedded URL. The ML classifier strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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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