Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b1205bca53e8b3…

MALICIOUS

PDF

32.2 KB
MD5: 7d1c59aae9360a7094d4184a8b95f014 SHA-1: 7f87217255d684ec66fc7ec7dcd1b6eba7b1ba2c SHA-256: f4b1205bca53e8b31fdcc56064bf2f39893b9b1f6d989d1131ecbca25268f88d
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable scripts, a common technique for exploiting PDF vulnerabilities. The 'PDF_XFA_NUMERIC_EVAL_STAGER' heuristic indicates the presence of a stager designed to evaluate numeric expressions, likely to deobfuscate and execute malicious code. The embedded URL is likely part of the exploit chain. ClamAV detection 'Pdf.Exploit.Dropped-92' further confirms its malicious nature.

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: Pdf.Exploit.Dropped-92 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-92
  • 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/