Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a13535721a56c5f…

MALICIOUS

PDF

111.3 KB
MD5: b591de9798c27d174f233a750d00b6a7 SHA-1: 4f4c7b75ab82931137ce7695615d3d2a0d19105b SHA-256: 3a13535721a56c5f5941dc8efa48b2466ed90ccec3e14c11cda219fb033b5cf3
248 Risk Score

Malware Insights

The file is a PDF document that leverages the CVE-2010-0188 vulnerability in Adobe Reader's XFA forms. This exploit is designed to download and execute a secondary payload, as indicated by the embedded script and ClamAV detections. The embedded script payload and the extracted artifact detection suggest the primary goal is to compromise the user's system.

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
236a6fa5591b2e337fb2fdb4db902a08fa7e45e8f0d8c600ebd783500d4d3aa5		 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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