Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb59a3741f9d718…

MALICIOUS

PDF

99.6 KB
MD5: 5b16906092633a9c3d413e59d8f7904f SHA-1: e97c68b8d791b3d043cebe9f0840257ddc5c5c2e SHA-256: cfb59a3741f9d7188d805421274ff54aa95f6e7e32fa1d912a6023dfff28d84d
136 Risk Score

Malware Insights

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

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF processing. The embedded script payload within the XFA form is likely responsible for executing the exploit. While the script content is heavily obfuscated and truncated, it indicates an attempt to leverage the vulnerability for arbitrary code execution. The embedded URLs are related to XFA schema definitions and do not appear to be malicious.

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
ee86707f7573a7990b0766874c8de94858dc33486dcccf56f4fc0a4b3bdd9f2f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101267 bytes

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