Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3fc38cc722c67b…

MALICIOUS

PDF

31.9 KB
MD5: 1c0b0d31673e7b670590b34f91a20797 SHA-1: 4f73b88ae243285a3cb52d2aad826b9d85b48168 SHA-256: fc3fc38cc722c67baf704022d1eb0df787eba1ca61839cda3ec7e3e401f97211
178 Risk Score

Malware Insights

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

This PDF file contains a high-severity XFA script that is flagged by ML classifiers and ClamAV as malicious (Js.Exploit.HTML-30). The script appears to be a stager designed to evaluate numeric expressions, likely to deobfuscate and execute further malicious code. The embedded URL, while not directly executable, is associated with XFA templates and may be part of the exploit chain. The primary attack pattern involves leveraging XFA scripting vulnerabilities to deliver a payload.

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/

Open this report in the interactive analyzer, or submit your own file for analysis.