Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f973f2b0d00b22…

MALICIOUS

PDF

31.8 KB
MD5: f609484bda89ee1724416d527f7dcb52 SHA-1: 5c2cac1a26ff3a05d5a3d67a32d167dfc3d1927c SHA-256: b5f973f2b0d00b22c7aead54549d402484120331c311e53a50aeb836377db045
158 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The sample is a PDF file that contains an XFA form, which is a known vector for exploiting Adobe Reader vulnerabilities. Specifically, the CVE-2010-0188 exploit was detected, targeting a LibTIFF vulnerability within XFA. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded URL is likely related to the XFA template, but its direct maliciousness is not confirmed by reputation.

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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