Malicious PDF — malware analysis report

Static analysis result for SHA-256 af54dd573d4177b2…

MALICIOUS

PDF

24.3 KB
MD5: 820c1f47565a622661cf3e1263a46dce SHA-1: 2d2cedc5914bd57523949487e09914c9a476ff2e SHA-256: af54dd573d4177b22b383206e2e4eec4f9a571a73f15aa0bd9b9d29dc754cd34
148 Risk Score

Malware Insights

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

The PDF file contains XFA forms with executable scripts, as indicated by the PDF_XFA_SCRIPT and PDF_XFA_NUMERIC_EVAL_STAGER heuristics. ClamAV detection (Js.Exploit.HTML-30) further confirms its malicious nature. The embedded URL, while seemingly benign, is part of the XFA structure and could be used in conjunction with the script to download or execute a payload. The exact script functionality is not fully detailed, but the presence of XFA exploitation stagers points towards a delivery mechanism for further compromise.

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/