Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9df10dd8b1d911…

MALICIOUS

PDF

14.3 KB
MD5: 418a90a952b48f5d74a7a267fb96ed22 SHA-1: 1425668e757084629175ce394f6cf7ee52e76500 SHA-256: de9df10dd8b1d9116161cd64cb0515042dc625505aa129f754b53dcdc06da19d
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that leverages XFA forms to exploit CVE-2010-0188 in Adobe Reader. The heuristic 'PDF_XFA_NUMERIC_EVAL_STAGER' suggests the XFA content is designed to evaluate numeric expressions, likely to decode and execute a payload. The embedded URL is likely related to the delivery mechanism or command and control. The ClamAV detection 'Pdf.Exploit.Dropped-78' further confirms its malicious nature as a dropper.

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.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
  • 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/