Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2153fe37b7acdb…

MALICIOUS

PDF

24.6 KB
MD5: 2fd2893e2a1a3292f53b18104210d4cd SHA-1: c12ed5111b018a8a5a96873cd549e9587a81db5d SHA-256: 3c2153fe37b7acdbb6fa04619976259dbc481d1453e23f68e47c405a88343100
178 Risk Score

Malware Insights

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

The PDF contains an XFA form with executable script, identified as a stager by heuristics. ClamAV detection as Js.Exploit.HTML-30 further confirms malicious intent. The embedded URL is likely part of the exploit chain, though its exact role is unclear without further analysis. The primary attack pattern involves leveraging XFA vulnerabilities to execute arbitrary code.

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: 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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