Malicious PDF — malware analysis report

Static analysis result for SHA-256 18aad0a3c22f71d2…

MALICIOUS

PDF

24.1 KB
MD5: 87960244dcd45d7486bf4930c46d3b4c SHA-1: 74abbc1e365c1c3e0c0695831bad37975f078c98 SHA-256: 18aad0a3c22f71d2c24b92f94fbe5ba8514400be0f48d0721e8111bbc7def3e7
162 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 multiple heuristics, including critical firings for CVE-2010-0188 (LibTIFF XFA exploit) and a high-confidence ML classifier. The presence of XFA form elements and the specific CVE indicate an exploit targeting Adobe Reader. The embedded URL, while seemingly benign, is part of the exploit structure.

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.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
  • 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/

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