Malicious PDF — malware analysis report

Static analysis result for SHA-256 61439c1fb4a6ab15…

MALICIOUS

PDF

24.5 KB
MD5: e190bc94be17f1d5b48a7f05484fdbb7 SHA-1: 8eb83e710d6d3ebdf31a013c85a36cd6fcbbcf43 SHA-256: 61439c1fb4a6ab154fd3afb78a6b9fcc58d75684e3b27f712efd206e837dfb75
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 ClamAV and an ML classifier. It specifically targets CVE-2010-0188, an exploit for Adobe Reader related to XFA forms. The embedded URL, while seemingly benign, is associated with XFA templates and could be part of the exploit chain. The document body contains obfuscated JavaScript-like code, likely intended to trigger the exploit and download a secondary payload.

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/