Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b3dacaf3c67284…

MALICIOUS

PDF

99.9 KB
MD5: 87191171abcb0e5f9d6fa39eecedb5c9 SHA-1: 4fcd888f55846a41ce0036b9eeca2694a1de7e28 SHA-256: 18b3dacaf3c6728404a97cc39e8b4b23fad437df8664037342ebdf57064b9014
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 heuristics. It exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms, to achieve code execution. The presence of an embedded file and script payload further indicates malicious intent, likely to download and execute a secondary payload.

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
7a0f34b2ab705a07bc7dc6e1461bd4a0d0b83328232b162af6a3d26ae31f4155		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101563 bytes

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