Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8d49ef1b289b28…

MALICIOUS

PDF

14.3 KB
MD5: fb1aa1daa6109cae520e16fbeabb7a0b SHA-1: 14dd77e6eee2dfe73d3cb73e450b8606c403c611 SHA-256: ae8d49ef1b289b28e2f8054ab88ebace6648c4687e7e99dc98ee4e28bb6c574b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample is a PDF file that leverages XFA forms to exploit CVE-2010-0188 in Adobe Reader. The heuristic firings indicate a critical exploit targeting XFA content, specifically a numeric evaluation stager. ClamAV also detected it as Js.Exploit.HTML-30, suggesting JavaScript-based exploitation. The embedded URL, while seemingly benign, is part of the XFA structure and likely used in the exploitation chain.

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/