Malicious PDF — malware analysis report

Static analysis result for SHA-256 657886c6d9cbf108…

MALICIOUS

PDF

100.0 KB
MD5: 168658231f5f347a80f29dec7174e490 SHA-1: 88f8545c5c60764be73d489be8bbc2e54309298e SHA-256: 657886c6d9cbf1088d852f39331e6dff982bb4cf74530360af75bdc18d6a0163
116 Risk Score

Malware Insights

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

The PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader's handling of XFA forms, to achieve code execution. The embedded script payload and ML classifier strongly indicate malicious intent. The exploit likely serves to download and execute a secondary payload, though the specific script content is too obfuscated to determine its exact function.

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
9dc8a573cfdfde40f2eff80a79adb197986dea9f9083a0ccff4a3f12fe07ad7a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101659 bytes

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