Malicious PDF — malware analysis report

Static analysis result for SHA-256 931ec62cca0383ed…

MALICIOUS

PDF

24.6 KB
MD5: 55ba17f3af6480fea016463b42958a33 SHA-1: d016a6900e5420fea3acde51640e62acbbfa1c02 SHA-256: 931ec62cca0383ed991137fb7a0c0bfc635f0773f6148fa5ced5ec46cecf34dd
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable script, identified by ClamAV as Js.Exploit.HTML-30. The XFA numeric stager suggests an attempt to evaluate and execute code. The embedded URL, while benign in reputation, is part of the XFA structure. The primary attack vector appears to be the exploitation of vulnerabilities within the XFA processing engine to deliver a 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/