Malicious PDF — malware analysis report

Static analysis result for SHA-256 95138e3956452129…

MALICIOUS

PDF

32.3 KB
MD5: 24c793cc880e36d9608300e0640e3543 SHA-1: 6b13597298233010265c95514fb869e269b9d3c4 SHA-256: 95138e39564521297cda6c5b4d32e2eae37d95a8e6136aeeb667a36ec77f18f9
178 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) elements, which are known to be exploited to execute embedded scripts. Heuristics indicate the presence of risky executable scripts and a numeric evaluation stager within the XFA form. ClamAV detection as Js.Exploit.HTML-30 further confirms its malicious nature. The embedded URL is likely part of the exploitation chain.

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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