Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c2e333217fbaec…

MALICIOUS

PDF

99.4 KB
MD5: 0ba8c946a106d8af9b5aafc7f6d334f0 SHA-1: c9838cb091f0320373a1755f69ec70516eaf506b SHA-256: 78c2e333217fbaecbebe1fa5a79426aac218b3106c805bbf5d63192b318c64dd
116 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader's handling of XFA forms. This exploit allows for arbitrary code execution, which is often used to download and run additional malicious payloads. The embedded script, though heavily obfuscated, likely facilitates this secondary stage execution. The ML classifier strongly indicates maliciousness.

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
b7f0818f823ca4fdfd744ef227f69be571f36512114762b0e25c573eb26e7546		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 100995 bytes

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