Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c9819c13d68cbf…

MALICIOUS

PDF

111.2 KB
MD5: ff2d1a14a5186d406f8b90690bc5473d SHA-1: b0fcb87a32b8a0463fa99a2ddc97e447c8cdbcf5 SHA-256: f3c9819c13d68cbfefac5597975a0986d4a9d709727a7d60f6d6f3b7baf9e54c
208 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF file contains an XFA form and triggers the CVE-2010-0188 exploit, indicating it's designed to compromise Adobe Reader. An embedded script payload was also detected and identified by ClamAV as 'Js.Exploit.HTML-27'. The primary attack vector is likely the exploitation of this known vulnerability to deliver a secondary payload.

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.
  • 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
930f141c44dacf77b75aed0cc7c52c0a160a3bb22f54d112ef44cec0c654c5bd		 pdf-embedded-script PDF raw stream script payload at offset 0x238 113149 bytes
Detection
ClamAV: Js.Exploit.HTML-27
Obfuscation or payload: unlikely

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