Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4ca787c4a792d9…

MALICIOUS

PDF

32.3 KB
MD5: 530419a43c8c05685c8c4bf8c4e3d4bc SHA-1: 98b3163b1f085e4c775080d6a3ad89bdebd3c2e7 SHA-256: 9f4ca787c4a792d923f77e7aff13cbad21b3e23b6221d64ae32bbdbc0e1089a3
88 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) elements, which are known to be exploited to execute embedded scripts. The 'PDF_XFA_SCRIPT' and 'PDF_XFA_NUMERIC_EVAL_STAGER' heuristics indicate that these scripts are designed to act as a stager, likely downloading and executing a secondary payload. The embedded URL, while seemingly benign, is part of the XFA template structure and could be a vector for further malicious activity. The confidence is high due to the specific XFA stager detection.

Heuristics 4

  • 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.
  • 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/