Malicious PDF — malware analysis report

Static analysis result for SHA-256 a452b97e4b6332e1…

MALICIOUS

PDF

31.8 KB
MD5: 4186d9e6c8feab0f9c141d3d6f451a90 SHA-1: f3223b8eab4ae3157d525d3d3456a35c682157da SHA-256: a452b97e4b6332e1d3e016320e1c3cce369d5034ac0d0a7c70293ab5c1b6dba6
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable script, identified as a stager by heuristics. ClamAV detection further confirms its malicious nature. The embedded URL is likely used to download or host the malicious payload. The script's exact function is not fully discernible due to obfuscation, but it is designed to exploit the XFA form's capabilities.

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/