Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a9e08c865489a0…

MALICIOUS

PDF

32.4 KB
MD5: 11dbc55c1b7d8363bc407359591751d4 SHA-1: a119b31ddf3c6e1139949d09f535eef37b36f229 SHA-256: d0a9e08c865489a006879e34463e7a7808c7ceae609c246d71c30253f8036403
178 Risk Score

Malware Insights

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

The PDF contains an XFA form with executable script, identified as a numeric evaluation stager. ClamAV detected this as Js.Exploit.HTML-30, indicating it likely exploits JavaScript vulnerabilities. The embedded URL is likely part of the exploit chain. The primary attack pattern involves leveraging XFA's scripting capabilities to execute malicious code.

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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