Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddf924dc4e1e82c…

MALICIOUS

PDF

31.7 KB
MD5: 1f1d406031dc1dc1c775334849932e9d SHA-1: 82431cdbe4a2e65f59af08911f6e39d8dddec12f SHA-256: fddf924dc4e1e82c321ef612d73cb1b2b5d9805bb6830f19aa7a60a4af4eb43f
178 Risk Score

Malware Insights

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

The PDF contains XFA form elements with executable scripts, identified as a stager for numeric evaluation. ClamAV detected this as Js.Exploit.HTML-30, indicating JavaScript-based exploitation. The embedded URL is likely part of the exploit chain. The obfuscated script content suggests an attempt to download and execute a secondary payload.

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/