Malicious PDF — malware analysis report

Static analysis result for SHA-256 383939cda2acf6bf…

MALICIOUS

PDF

28.6 KB
MD5: bfe471c61c4127d08ba9c21e763817dd SHA-1: eefa60918bfb782d6c08a0e52209c973c3124727 SHA-256: 383939cda2acf6bf0707acb0bb1a71c982c428d251ac35a4bcf5c22ee3e0b6c2
168 Risk Score

Malware Insights

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

The sample is a PDF file that contains an XFA form, which is known to be a vector for exploits. Specifically, the CVE-2010-0188 heuristic indicates a LibTIFF XFA image exploit. The ClamAV detection further confirms its malicious nature. The embedded URL is likely part of the exploit chain, though its exact purpose is not detailed by the heuristics.

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.Agent-36825 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36825
  • 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/