Malicious PDF — malware analysis report

Static analysis result for SHA-256 1663ebb88093d1a8…

MALICIOUS

PDF

20.2 KB
MD5: 19cb5cfba001308ea72a0c499b65ffd8 SHA-1: 3a9a20eb9b05f3e0353819e7168a782344847e73 SHA-256: 1663ebb88093d1a83c165cadac626f0aff7a628dcd12076d0c282246ab23e3f3
162 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by multiple heuristics, including a critical finding for CVE-2010-0188, an Adobe Reader exploit targeting XFA forms. The ML classifier also strongly flagged it. The embedded URL, while seemingly benign, is present within the document structure. The exploit likely leads to arbitrary code execution, and given it's a PDF, it was likely delivered as a spearphishing attachment.

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-36826 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36826
  • 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/