Malicious PDF — malware analysis report

Static analysis result for SHA-256 683d3019cd4fdf8b…

MALICIOUS

PDF

24.1 KB
MD5: 4ff9400a68b04608e05fb40f151b8f9a SHA-1: 1a7ea047aa733d5c442fd7d519eb65da9733e7ae SHA-256: 683d3019cd4fdf8bb163f3f8a13bbf9c27afef9d62614ae65909f5a3a0a43d4f
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 triggers the CVE-2010-0188 exploit related to Adobe Reader's LibTIFF handling within XFA forms. This exploit is designed to achieve code execution, enabling the download and execution of further malicious content. The embedded URL, while seemingly benign, is part of the XFA template structure and could potentially be involved in the exploit chain.

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/