Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27904e654a8a9fe…

MALICIOUS

PDF

111.0 KB
MD5: ec34bfab7060c1af897a5d72c48b7211 SHA-1: 8b4cca07d6aeaddd09b7dd2331a1663047bc9825 SHA-256: c27904e654a8a9fe19d679217e919bbc01df46c44acc0db19e35d7d54c5c4953
190 Risk Score

Malware Insights

The PDF file utilizes XFA forms and contains an embedded script payload, indicating malicious intent. The critical heuristic firing for CVE-2010-0188 strongly suggests exploitation of a known Adobe Reader vulnerability. The embedded script is likely responsible for downloading and executing a second-stage payload, though its exact functionality is obscured by obfuscation. The ClamAV detection further confirms the malicious nature of the file.

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
29052da89ce3aaa19b1fb1f7551671ded9806369f7b931de945d39f35da1736b		 pdf-embedded-script PDF raw stream script payload at offset 0x238 112899 bytes

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