Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef0416bb5cfb61c…

MALICIOUS

PDF

99.9 KB
MD5: cbc5f92f6511f23f54c834da6db4695e SHA-1: 8d5ec575183bbc0dc5cde87ba1d85dce7896b991 SHA-256: 5ef0416bb5cfb61cd4ba4b908215fb566fbddb795ea4be891fb3d69a838499c0
116 Risk Score

Malware Insights

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

The PDF sample contains embedded XFA content and triggers the CVE-2010-0188 exploit, which is known for client-side code execution. The ML classifier strongly indicates maliciousness. While no specific URLs or scripts were directly indicative of a payload, the exploit itself is the primary indicator of malicious intent, likely leading to a secondary download.

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
2477fb4fc224677eb8f64a2019421877ef8a0c67f7c96588c6adb21beef2d1cd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101559 bytes

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