Malicious PDF — malware analysis report

Static analysis result for SHA-256 635cd9355ebac3da…

MALICIOUS

PDF

100.1 KB
MD5: 22141606bf3b1b75f1d33a9f24eb2be5 SHA-1: 37eef9ba83de664c3832c8a2475fcb23ffc604ca SHA-256: 635cd9355ebac3da179220e2eced709450c4890a7adcc07b29f2f864c505ddce
116 Risk Score

Malware Insights

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

The PDF file contains embedded XFA form data and triggers the CVE-2010-0188 exploit, which is known to target Adobe Reader. This exploit is designed to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier strongly indicates malicious intent.

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
0d9df28821a15ce29b4fbb1c9ee82e2a9d3331451847c8d05fa6e3c5a0c03acf
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101726 bytes