Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5396d49df0243ed…

MALICIOUS

PDF

31.8 KB
MD5: 6dce471f1ce4fbcddc47dab39611e653 SHA-1: b6153166bb537033dfce64c60e0649e7443cfb24 SHA-256: a5396d49df0243edd124fe302bd98ee8fcec28187b42704dcc68670a13d0920b
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains an XFA form with executable script, identified as a stager by heuristics. ClamAV detected this as Js.Exploit.HTML-30, indicating it likely downloads and executes a second-stage payload. The embedded URL is likely part of this exploit chain.

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/