Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa3371b3d12d117…

MALICIOUS

PDF

99.7 KB
MD5: fd70830885ffc43242705ac20ae5d6a3 SHA-1: 1057ab918d7d470a13e2818d0525892d73d27159 SHA-256: 5fa3371b3d12d11741eb44567c08350535ef5f4fcc12e0e8aaaaee7f27e158eb
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file identified as malicious by an ML classifier and contains heuristics indicating an exploit for CVE-2010-0188 within its XFA forms. This vulnerability allows for arbitrary code execution, which is likely used to download and execute a secondary payload. No specific family could be identified, but the exploit technique is clear.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 script payload in PDF stream low 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 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
32a591623977f0e11685327188deb81fbf831504108360b1e24ebb720e9779fb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101391 bytes