Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b6bf470ef0e770…

MALICIOUS

PDF

112.1 KB
MD5: 419a3ac81274420806b63549ad7b1d13 SHA-1: 49ae5576ce495fdd359b32627d23d96d9d502ef6 SHA-256: d8b6bf470ef0e7707657033f3af9a2f6783e0ab55f4d64ec65671d28f19b5ab3
248 Risk Score

Malware Insights

The file is a PDF document that contains XFA (XML Forms Architecture) content, which is known to be a vector for exploits. Heuristics indicate the presence of heap spray and exploit code targeting CVE-2010-0188, a vulnerability in Adobe Reader's LibTIFF component. The embedded script payload within the XFA form is designed to trigger this exploit, likely leading to the download and execution of a second-stage payload. The embedded URLs are related to XFA schema definitions and do not appear to be malicious themselves.

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.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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_0000023b.bin
e3b810b4166e3b805a581b02317bbd0d5f0404f72ab9e416e1f2be7264de5b75		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 114045 bytes

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