Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e3eb2442bd6036…

MALICIOUS

PDF

32.3 KB
MD5: 3b22f66357d5c3de6987839f103915f9 SHA-1: d55f0a611b0311438498814354f617d3f2cebc9c SHA-256: 98e3eb2442bd60363e01654cb8e9873614fe9a2c63ce198be1a83c8a1ebcbe09
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 as a stager by heuristics. ClamAV detection 'Js.Exploit.HTML-30' further confirms malicious intent. The embedded URL is likely used to download a second-stage payload. The script's exact function is not fully discernible due to obfuscation, but the overall pattern suggests exploitation of PDF vulnerabilities.

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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