Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9c62a442a97287…

MALICIOUS

PDF

32.4 KB
MD5: 461603ef8566d4b505638c7954e9a770 SHA-1: fad1382a8b0d5f509df346aee4058a79e5a48916 SHA-256: 4c9c62a442a97287bf92efeef26b9eded993d68954e3cc604769588f312c7f86
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable JavaScript, identified by the PDF_XFA_SCRIPT and PDF_XFA_NUMERIC_EVAL_STAGER heuristics. ClamAV detected this as Js.Exploit.HTML-30, indicating it's a known JavaScript exploit. The embedded script likely acts as a stager, attempting to download and execute a second-stage payload. The embedded URL is likely related to the XFA schema but could be a lure.

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/