Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3510930848a59d7…

MALICIOUS

PDF

24.4 KB
MD5: 25d00ce314b39c3174949c7046e62e05 SHA-1: d462cd941c32be87107f19333d4b484112ae061a SHA-256: f3510930848a59d7d12ac1282d51f905cdb767f021a37732afb822dcb27f6333
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains XFA form elements with executable scripts, flagged by multiple high-severity heuristics. The 'Js.Exploit.HTML-30' ClamAV detection and the ML classifier strongly indicate malicious intent. The embedded URL, while seemingly benign, is part of the XFA structure and could be used in conjunction with the script to download and execute further malicious content.

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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