Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cc98813ac87d86…

MALICIOUS

PDF

99.7 KB
MD5: 07969521b4fb52ab7c801c955fa2e64e SHA-1: 342a6acde8236234367a5c23d1c65a405047d5d3 SHA-256: 16cc98813ac87d8638cc7ded8cda8c01edc07dbae1bb00ec1a41631905ef22ce
116 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by an ML classifier. It exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF parsing, to achieve code execution. The embedded script, though obfuscated, likely facilitates the download and execution of a secondary payload, a common technique for initial compromise.

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
94fa7edd6d83c5fa688fcaa111a7874f806f06500a8e5fc0e0e4493c319a6eab		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101374 bytes

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