Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c5fceafb33d4eb…

MALICIOUS

PDF

24.1 KB
MD5: c95f3bdc92b6117493a74b0076ff764f SHA-1: d245e5b1d51d1c5542325028f75440625dd82fcd SHA-256: a1c5fceafb33d4eb5b2c53d4169c2618be3eda0b2dba78c3da184f16c29dd4af
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1204 User Execution

The sample is a PDF file identified as malicious by ClamAV, specifically detecting the 'Pdf.Exploit.Agent-36821' signature. Static analysis indicates the presence of an XFA form and a critical finding for CVE-2010-0188, an Adobe Reader LibTIFF XFA image exploit. This suggests the PDF is designed to exploit this vulnerability upon opening in a vulnerable version of Adobe Reader, likely to download and execute a second-stage payload. The embedded URL, while appearing to be a schema reference, is listed as an embedded URL, which could be part of the exploit chain.

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/