Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4f26c78fc42b8a…

MALICIOUS

PDF

99.7 KB
MD5: 5d245a5cc291274c2509813006d9d2cd SHA-1: c5134c9af3f8fd63a54e0fafeed013f7d935ed16 SHA-256: ac4f26c78fc42b8a2c428ceb9b7f5fa364f3b48229a66df3680f05951e4cefb3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF sample exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF parsing. The embedded script payload within the XFA form indicates an attempt to execute malicious code. While the exact payload is not fully discernible from the provided data, the exploit pattern strongly suggests the download and execution of a secondary stage. The presence of embedded file artifacts further supports this malicious intent.

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.
  • 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.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
40fc6de9cc9e572b4654250bd54deeb4bb18cf6b6bd5d95bbd7057dd5d953ef8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101328 bytes

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