Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9f763bfaa09a88…

MALICIOUS

PDF

255.9 KB
MD5: a9190d06b1ecbb90990fbbf3490c3084 SHA-1: 7f2516c0239638180ef75a17e14bd2bdb829bca3 SHA-256: 0c9f763bfaa09a883503993a5430d80c9f324e2b6e4c99e0d1f3cd76ba19e3e8
168 Risk Score

Malware Insights

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

The PDF sample contains embedded XFA (XML Forms Architecture) content and triggers the CVE-2010-0188 exploit, which is known to target Adobe Reader. The embedded script payload, though heavily obfuscated, is indicative of malicious intent to execute further stages. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_0000026c.bin
4ff1b9e15de409d6f079d1e7805d320636bc2f9d09c07e5c0b925ed0e6cb259f		 pdf-embedded-script PDF raw stream script payload at offset 0x26C 77172 bytes

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