Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fcd6151474040e…

MALICIOUS

PDF

32.1 KB
MD5: a7aa237c79f9e75d21c4d6842c475313 SHA-1: 13f6af29445cab798d315313967934c39319cc93 SHA-256: 11fcd6151474040e543d9a292d4a7a0026b0eafcbaf612a0b7702533e7bc61f5
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains XFA (XML Forms Architecture) which is known to be vulnerable to code execution. Heuristics indicate the presence of risky executable scripts and a numeric evaluation stager within the XFA form. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER
    PDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
  • 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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