Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3a8261ccb70491…

MALICIOUS

PDF

31.8 KB
MD5: 43d053bb87a12665a28667b164e0bf72 SHA-1: 692a140febeecbc702e63ec7690e68af0f68e025 SHA-256: ff3a8261ccb70491aff14e76eab9365683a5d4fcea77ddbe116e89a27ac06e9a
148 Risk Score

Malware Insights

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

The PDF file contains XFA forms with executable scripts, identified as a stager by heuristics. ClamAV detection (Js.Exploit.HTML-30) further confirms malicious intent. The embedded URL is likely part of the exploitation chain. The script's exact function is obscured, but it's highly probable it downloads and executes a second-stage payload.

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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