Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb218b84ba0725f3…

MALICIOUS

PDF

111.2 KB
MD5: a78e7138d13ec26bf7761d94ca35c5a8 SHA-1: 971529823e8f557a13afa0c7f7b0265b14fb6b9f SHA-256: cb218b84ba0725f3d2666840e1e3129a05d92e83ec7af315417a1736897cbf2f
248 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.007 JavaScript

The file is a PDF document that leverages XFA (XML Forms Architecture) to trigger a heap spray exploit targeting CVE-2010-0188 in Adobe Reader. The embedded script within the XFA form is responsible for executing this exploit. This indicates the document is designed to compromise the user's system upon opening, likely to download and execute a further stage of malware. The presence of multiple embedded script markers and XFA-specific exploit heuristics strongly supports this conclusion.

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
ea6fcc6d8641177599e74d543e38e829bb8ddac247a45387bcee889d2264abe7		 pdf-embedded-script PDF raw stream script payload at offset 0x23B 113175 bytes

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