Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb1b5debdb6517c…

MALICIOUS

PDF

24.0 KB
MD5: 23f4dd766fc6c3a9e5c9f50f27d6d4c3 SHA-1: eca79acf67ec228a78c35cb37281598c005416ea SHA-256: 5fb1b5debdb6517ce99b1a8666b4367bcd886bbda037bc5db176b4c55afe7050
162 Risk Score

Malware Insights

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

The file is a PDF that triggers a critical heuristic for CVE-2010-0188, an Adobe Reader exploit targeting XFA forms. The ML classifier also strongly indicates maliciousness. The embedded URL, while benign in appearance, is associated with XFA templates and could be a lure or part of the exploit chain. The exploit's purpose is to achieve code execution, likely for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/