Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99d6f6f678ce782…

MALICIOUS

PDF

18.1 KB
MD5: 8a66eeef2b0e41ff70e8a7969a63465d SHA-1: a8bcd7539dd8944355c127e80e2e81c3f9b0e0cb SHA-256: c99d6f6f678ce782986bf60c46dc2997033af4e8818c615780dd94803a535a2d
168 Risk Score

Malware Insights

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

The sample is a PDF document that leverages XFA (XML Forms Architecture) to exploit CVE-2010-0188 in Adobe Reader. The XFA form contains a numeric evaluation stager which is indicative of an exploit attempting to download and execute a second-stage payload. The embedded URL is likely related to the exploit infrastructure.

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-36828 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36828
  • 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/