Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe860ca5bfd301f…

MALICIOUS

PDF

32.4 KB
MD5: ea81af7e229f577ffe513f4295f378b1 SHA-1: d1c64b3b228ae6b5a7b10e8b93f64e7e2e2229b5 SHA-256: 2fe860ca5bfd301feb7565f7ffe4d1caefb80b8761d1a94d20e0b085e9f176a4
118 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable script, identified as a numeric character-table eval stager. This stager is designed to download and execute a second-stage payload. The ML classifier strongly indicates maliciousness, and the embedded URL is likely part of the exploit chain.

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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