Malicious PDF — malware analysis report

Static analysis result for SHA-256 235bc25517b5fb7b…

MALICIOUS

PDF

111.3 KB
MD5: 6c55a8841db1ecae6c846a4712aa1773 SHA-1: b86b19d2484dc91f304567bfbcee967e29f1039c SHA-256: 235bc25517b5fb7b663f9612bfd92af13b6288f15354eefa13a5363f249f16bb
248 Risk Score

Malware Insights

The PDF file contains an XFA form and triggers the CVE-2010-0188 exploit, indicating it's designed to compromise systems via Adobe Reader vulnerabilities. An embedded script payload was also detected, which likely executes malicious code. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Exploit.Agent-6136306-0 and an extracted JavaScript exploit.

Heuristics 7

  • 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
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
b93ff6609dcfa3f253c16128d8185a6221499da4a5b4756b87fb0ccdd15b6f4b		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113265 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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