Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba74f6c33c91842…

MALICIOUS

PDF

21.5 KB
MD5: bc4be9513987c9b0fd530870e70f68b3 SHA-1: e762a704ebd5cfb83c0c1568f9090b5608784a39 SHA-256: 9ba74f6c33c91842fed3aaa71c72385eda02e57edfdab866a99e388e685c8778
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.001 Phishing: Spearphishing Attachment

The sample is a PDF document that utilizes XFA forms, triggering heuristics for CVE-2010-0188, a known Adobe Reader exploit. The XFA numeric stager suggests the document is designed to execute a secondary payload. The embedded URL, while seemingly benign, is part of the XFA template structure and not directly indicative of a download source in this context. The ClamAV detection further confirms its malicious nature.

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: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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/