Malicious PDF — malware analysis report

Static analysis result for SHA-256 63665fb4614a573c…

MALICIOUS

PDF

17.8 KB
MD5: e646dc957cf53820fd1d6789db970097 SHA-1: a2221555c55a92d55d9bd5cb86cdb1969cef29a6 SHA-256: 63665fb4614a573c09c3ee20e1fb7f6c27d02054b1f4ca5c8c9158ea07ac36e4
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF containing an XFA form that exploits CVE-2010-0188, a known vulnerability in Adobe Reader. This exploit is designed to execute a payload, indicated by the 'CVE_2010_0188' and 'PDF_XFA_NUMERIC_EVAL_STAGER' heuristics. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded URL, while seemingly benign, is part of the XFA template structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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-36831 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36831
  • 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/