Malicious PDF — malware analysis report

Static analysis result for SHA-256 af56069520057c93…

MALICIOUS

PDF

24.6 KB
MD5: 1c317f357e91c16b6e42194dab12714e SHA-1: fddfe2dcef4faf0bfe6927aadf81371ffdf5b4ed SHA-256: af56069520057c93a5bea0c3303c89b9c2febedabcf2e33f492f88d219b91904
178 Risk Score

Malware Insights

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

The PDF contains XFA forms with executable scripts, 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 exploitation chain, though its specific function is not detailed by the available evidence. The ML classifier strongly indicates maliciousness.

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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