Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e81b1e8ca34c57b…

MALICIOUS

PDF

24.2 KB
MD5: 9f3272374fd496d22d42df542410e0ca SHA-1: 616eb835b381a5c6f46b74562d16e5fd0c92cc23 SHA-256: 5e81b1e8ca34c57b118307b1de6c9f8a1ceb644a6065de7c0eb358a0d5632b62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and a machine learning classifier. It contains an XFA form and exploits the CVE-2010-0188 vulnerability in Adobe Reader, likely to download and execute a second-stage payload. The embedded URL, while seemingly benign, is part of the XFA template structure.

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: Pdf.Exploit.Agent-36821 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36821
  • 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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