Malicious PDF — malware analysis report

Static analysis result for SHA-256 71abcd69d003e6f1…

MALICIOUS

PDF

99.8 KB
MD5: a1f44183d1fa7a885319f443860d11a6 SHA-1: bb37c34f62efea9d37926e81d0195a87649266ba SHA-256: 71abcd69d003e6f12ae7e5690c31a23bcfa4e1a49730bb9073f2fb76ed76b3b5
116 Risk Score

Malware Insights

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

The PDF sample contains embedded XFA content and triggers the CVE-2010-0188 exploit, which is known to facilitate arbitrary code execution. The ML classifier strongly indicates maliciousness. While the document body and embedded URLs are benign, the critical heuristic points to a known exploit for client execution, likely used to download further malicious content.

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
1686e9e8af09d6fd89891fa7517736b92d2e1c9db31bceceda7273ecd0884b5b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101556 bytes

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