Malicious PDF — malware analysis report

Static analysis result for SHA-256 1857ab27c7d6c282…

MALICIOUS

PDF

79.1 KB
MD5: 15c0b933b2ba2435de7e72c461287059 SHA-1: 5094934bc86b2f6dd4f67e7634b6c430f49c6032 SHA-256: 1857ab27c7d6c282461287d2d811b6db9fc7cb7734afb9d2f91d0802c1e9415d
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by an ML classifier and a critical heuristic for CVE-2010-0188. This indicates it exploits a vulnerability in Adobe Reader, likely to achieve arbitrary code execution. The PDF also contains embedded scripts and an embedded file, suggesting it's designed to deliver a secondary payload. The benign URLs present are likely decoys or standard XFA schema references.

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
b5023d81983b48c14acef51a7aec2f89433aa368719b0781bef8ff913f6eecf4		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 80210 bytes

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