Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1319ee08ad7c6c…

MALICIOUS

PDF

14.4 KB
MD5: dd7da89d13940a9189b7a3f447f772c5 SHA-1: 51662626ff823679e0b9170d5e25f0aedd9fea95 SHA-256: ae1319ee08ad7c6c11d6fe85b9b78e1230cf29fcb472985c45b89a06a427e7b1
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains XFA form data which is being evaluated using numeric character-table evaluation, a known technique for exploiting CVE-2010-0188 in Adobe Reader. The ClamAV heuristic 'Js.Exploit.HTML-30' further indicates the presence of JavaScript-based exploit code. The embedded URL is likely related to the XFA template, but the primary exploit mechanism is the XFA evaluation itself.

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • 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/