Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afd6f5a32f844a7…

MALICIOUS

PDF

31.9 KB
MD5: 795ea42234c15b58f35dbde9f4629b2b SHA-1: f7a6741eb5c51e8af794831427bc5622c15c5b50 SHA-256: 4afd6f5a32f844a74b87c24e40823f169d06a7c8cc7737470a7bdc0b31d7780b
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an XFA form with executable JavaScript, identified by multiple high-severity heuristics. The ClamAV detection 'Js.Exploit.HTML-30' and the presence of an embedded URL suggest the file is designed to exploit vulnerabilities. The XFA numeric stager indicates a mechanism for executing further malicious code, likely related to the embedded JavaScript.

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/

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