Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0cb213c46b7fb4d…

MALICIOUS

PDF

21.2 KB
MD5: 86ad2af07491d5e9e7b42d8a608aed39 SHA-1: b8740a2652cbdf9fcbb46a1271739c8009294c5a SHA-256: a0cb213c46b7fb4d399943f61a6c2d229f6a884a0086aaae98ccc84ee8c32258
170 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample is a PDF file that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA processing. The XFA form and numeric evaluation stager heuristics indicate the presence of exploit code designed to execute arbitrary commands. ClamAV also detected this as a malicious PDF exploit. The embedded URL is likely related to the XFA template, but its reputation is unknown.

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/