Malicious PDF — malware analysis report

Static analysis result for SHA-256 055fab64e821e123…

MALICIOUS

PDF

32.4 KB
MD5: 81ba38880a67e4ce47e242ac9c4488cd SHA-1: e6b5dfcb82a5255b4c2e8f1b65301dfe0ff34281 SHA-256: 055fab64e821e123ee80ccb36848816fa6e2b79b2173d1dca1d473c84b41817f
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains XFA (XML Forms Architecture) which is known to be used for exploiting vulnerabilities. Heuristics indicate the presence of executable scripts and a stager designed for numeric evaluation, strongly suggesting the execution of malicious code. The embedded URL is likely part of the exploit chain or payload delivery.

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: Pdf.Exploit.Dropped-92 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-92
  • 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/

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