Malicious PDF — malware analysis report

Static analysis result for SHA-256 66edbf21a7db1710…

MALICIOUS

PDF

24.3 KB
MD5: 6d3930a8e7bafe0797b35675aa6a088f SHA-1: 3aa33dc5e6f44576b7efeef237dd8a9c11bf94f5 SHA-256: 66edbf21a7db1710aca75d11689509d0747318ccf483a8d3708f4da2f2aec934
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file identified as malicious by multiple engines, including ClamAV (Js.Exploit.HTML-30) and a machine learning classifier. It contains an exploit for CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The embedded URL, while seemingly benign, is associated with XFA templates and may be a lure or part of the exploit chain. The presence of XFA and the exploit strongly suggest an attempt to execute arbitrary code, likely for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • 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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