Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e74b251d3febde…

MALICIOUS

PDF

14.2 KB
MD5: 08dfa6b2eb30d23aaf16d05ee40dbf19 SHA-1: c54184e2f443e3be4238e85c464fc8bda3aadf7b SHA-256: f8e74b251d3febdee087288b57d28b1c0d380a84e6d4132748e3acbeb1f8612c
168 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 triggers multiple critical heuristics related to XFA forms and a specific exploit, CVE-2010-0188. This exploit targets Adobe Reader's handling of LibTIFF images within XFA forms. The embedded URL, while not directly malicious in reputation, is part of the XFA structure. The ClamAV detection 'Pdf.Exploit.Dropped-78' further confirms its malicious nature. The primary attack vector appears to be exploiting a known vulnerability in older versions of Adobe Reader via a crafted PDF document.

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/