Malicious PDF — malware analysis report

Static analysis result for SHA-256 efedabbfe7c1247f…

MALICIOUS

PDF

32.2 KB
MD5: b49afd117f01d747ec5e7975f0b4cda1 SHA-1: 034889d65ba13e3a1760fe99157e62fdd4d26dcf SHA-256: efedabbfe7c1247f502cec2b5e0589e9ea4e9d442ae67e3bcd59533517fb60c6
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains an XFA form with executable script, identified as a stager designed to evaluate numeric expressions. This stager likely downloads and executes a second-stage payload. The embedded URL is associated with XFA schemas, further supporting the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/

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