Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd4ba616bc1c7f7…

MALICIOUS

PDF

32.7 KB
MD5: 59ab40bcfd93128398220256def8b57d SHA-1: f883b12449b0fcc224f0c4a61f150f67421e2912 SHA-256: bcd4ba616bc1c7f7b3eddf7daca2b12a82d26fa5d43e84b8c3d10fb1dbac7f4e
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 a JavaScript-based exploit. The embedded URL is likely part of the exploit chain. The script's purpose is to download and execute a second-stage payload.

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/