Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea729c09848fe66f…

MALICIOUS

PDF

32.0 KB
MD5: a4d33ef631744419700a0fe1dc665d4f SHA-1: 7f0799ab6767a9fa48bfcd33bb6239aa465e11e9 SHA-256: ea729c09848fe66f2e1c56e8a3efe0c007352b5e85af10565946f8a24cfd4df4
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 numeric evaluation stager. This script is likely designed to download and execute a second-stage payload. ClamAV detection as Js.Exploit.HTML-30 further supports its malicious nature. The embedded URL is likely part of the exploit chain.

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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