Malicious PDF — malware analysis report

Static analysis result for SHA-256 796a9a74e088f0b2…

MALICIOUS

PDF

79.1 KB
MD5: e0a5a45b0acc3d254e69c36f5fd8e12c SHA-1: 24b4bf6ec9e189e10706027d8096931e3c7645e1 SHA-256: 796a9a74e088f0b25876dea3a87d83ed9c60a073194c947be8b74be9ce12c76c
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical heuristic firing for CVE-2010-0188 indicates this PDF exploits a known vulnerability in Adobe Reader's handling of XFA forms. The embedded file and script payload markers suggest it is designed to download and execute a secondary stage. The ML classifier strongly supports a malicious classification.

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
00db29573fd6eee752f556b9aa81187ba2ca60f4d72e07dd699ab4ad5710a1fb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80273 bytes