Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8673d9f9f5fa99…

MALICIOUS

PDF

31.6 KB
MD5: 4865f542c5741a2dc3a145ebc2cc35ac SHA-1: b5a3260f3a96803c194136ffa7c5784eb8e55217 SHA-256: db8673d9f9f5fa99b1a67d8c4eb5b0260c23198aa3306ff3b8deeb7bf1ed0470
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable scripts, identified as a stager by heuristics. ClamAV detected this as Js.Exploit.HTML-30, indicating it likely exploits a PDF viewer vulnerability to run malicious JavaScript. The embedded URL is likely part of the exploit chain.

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/