Malicious PDF — malware analysis report

Static analysis result for SHA-256 987963e3fbd40283…

MALICIOUS

PDF

31.6 KB
MD5: 4b5414dc6b1eeb32d35d4f31a8e509e1 SHA-1: 942ca8093d4cb62a6c1abbc15ee573ce31a65c7e SHA-256: 987963e3fbd402835ca8c58206d8875697f37177aff65a4cc1a3d134002743ee
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 'Js.Exploit.HTML-30' further confirms malicious intent. The embedded URL is likely used to fetch and execute a secondary payload. The script's exact functionality is obscured, but the overall pattern suggests a downloader or exploit delivery mechanism.

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/