Malicious PDF — malware analysis report

Static analysis result for SHA-256 857075590ae7321f…

MALICIOUS

PDF

24.2 KB
MD5: b2b5444636a8ab49ae2836a13237ab66 SHA-1: c7d42d87116c49cf6d9ba233ccdaab0e21ed5771 SHA-256: 857075590ae7321f79c86f733d3f4949c5c5922e923321a64bf8651510dc5543
162 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by multiple heuristics, including ClamAV and an ML classifier. It specifically targets CVE-2010-0188, an Adobe Reader vulnerability related to XFA forms, indicating an attempt to execute arbitrary code. The embedded URL, while seemingly benign, is part of the XFA template structure and could be used in conjunction with the exploit.

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/