Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bffd8287d0235b2…

MALICIOUS

PDF

14.1 KB
MD5: f8bd6de3d965a043afea14bbfd64907a SHA-1: 79bc0bd268268b1ed72e44d1f37e285c2484ecf0 SHA-256: 4bffd8287d0235b2cac29d34146efa9f6b3410d0baa6e518539d833f66739d91
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious JavaScript T1204.002 Malicious Link: Malicious File

The PDF file contains XFA (XML Forms Architecture) data, which is leveraged by the CVE-2010-0188 exploit targeting Adobe Reader. The heuristic firings indicate that the sample uses an XFA numeric stager to evaluate JavaScript, and ClamAV detected it as Js.Exploit.HTML-30. The embedded URL is likely part of the exploit 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/