Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc3499fd5d63441…

MALICIOUS

PDF

110.8 KB
MD5: eec56115d35f779ed94df696f37e0ebe SHA-1: b15f743c997e363fcb0425af4f0b2aa0e3147eb8 SHA-256: 9bc3499fd5d6344113c64cb8585080768a9727409224d65d27692a06b6be0a39
190 Risk Score

Malware Insights

The file is a PDF document that leverages the XFA form functionality to exploit CVE-2010-0188, a known vulnerability in Adobe Reader. The embedded script payload, detected by multiple heuristics, is responsible for delivering the exploit. The ClamAV detection confirms the malicious nature of the file, identifying it as Pdf.Exploit.Agent-6136306-0. The embedded URLs are related to XFA schema definitions and do not appear to be directly malicious.

Heuristics 6

  • 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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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_00000238.bin
127fffa8349820859bd481b6f1258ab4a18ac43436c28bf4d8bab30a813433db		 pdf-embedded-script PDF raw stream script payload at offset 0x238 112777 bytes

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