Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc696edddb6fe72…

MALICIOUS

PDF

21.4 KB
MD5: 66c15d7385e42f6e01846db7f68b63cb SHA-1: 9a99a0e5335a6457e39ae4e6d9d7a9c93a242511 SHA-256: acc696edddb6fe72cb668d86b3944998ef60be0b4ac55d7ff9731ddfe38c53d2
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains XFA form elements and triggers a critical heuristic indicating exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader's handling of LibTIFF within XFA forms. This suggests the document is designed to exploit this vulnerability upon opening, likely to download and execute a second-stage payload. The embedded URL, while seemingly benign, is part of the XFA structure and may be involved in 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: 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/