Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcc5c6e3dde5398…

MALICIOUS

PDF

17.9 KB
MD5: 013322ff03e79f2794c9ccac68b116dc SHA-1: d60236a0c13025e3364e1a6a9cf68f043ccda19a SHA-256: dfcc5c6e3dde5398cbca1d678cdfce454bbb4b1968a1caf5b24307cea4da27b7
168 Risk Score

Malware Insights

The sample is a PDF file that leverages the XFA (XML Forms Architecture) feature to exploit CVE-2010-0188 in Adobe Reader. The XFA numeric eval stager indicates the presence of exploit code designed to download and execute a second-stage payload. The embedded URL, while seemingly benign, is part of the XFA template structure and could be used in conjunction with the exploit.

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/

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