Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3f4f6886207559…

MALICIOUS

PDF

31.8 KB
MD5: 77bdb6be4c3f166d7a93bed3061a5d69 SHA-1: f7e59c64847b1328955f69c9cb792a63993b2e09 SHA-256: fa3f4f68862075596b4ca7e680b3089c75f4526b84f217d6cff62c8b89687d7b
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable scripts, identified as a potential stager for further exploitation. ClamAV detected this as Js.Exploit.HTML-30, indicating a JavaScript-based exploit. The embedded URL, while seemingly benign, is part of the exploit structure. The primary attack vector appears to be leveraging XFA form vulnerabilities to execute malicious code.

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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