Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9d885407fb28a8…

MALICIOUS

PDF

14.4 KB
MD5: e9eca8339c5dcc22b009e1df77e3f1c3 SHA-1: 2beffd0db61010b3cb4f6f092c5c77d8e4887021 SHA-256: 1c9d885407fb28a8c2c193febc1ad48544ca2105ae7c545461c6af443f1a0a94
168 Risk Score

Malware Insights

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

The file is a PDF document that leverages XFA forms to exploit CVE-2010-0188 in Adobe Reader. The heuristic firings indicate the presence of an XFA numeric stager and a ClamAV detection for Js.Exploit.HTML-30, suggesting the execution of JavaScript. The embedded URL is likely used to download a secondary payload. The attack pattern is consistent with exploiting a known vulnerability in PDF readers to deliver malware.

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/