Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff1ba8e61a8f0e5…

MALICIOUS

PDF

99.6 KB
MD5: e4692d79963bf6892da6d97d17dbf524 SHA-1: 4cba45cabe1f856e120cd2ac1b6770936306772c SHA-256: 5ff1ba8e61a8f0e5de963b00bc2688a813d1c76c9c93a5ad41278a6932529cbc
116 Risk Score

Malware Insights

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

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. This exploit allows for arbitrary code execution on the victim's machine. The ML classifier strongly indicates maliciousness, and the presence of an embedded file further supports this. The benign URLs are likely decoys or related to the XFA form structure itself.

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
254a081b95b245937f2d987afc728dee449fa7946d3fbf1ebe0c2ec996e3f10f		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101211 bytes

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