Malicious PDF — malware analysis report

Static analysis result for SHA-256 1164f839b7af5f63…

MALICIOUS

PDF

99.9 KB
MD5: ed6d2477ac3b600f1a96738267fc33e0 SHA-1: 730911e9846d68e552f955696500e0f0cf446d93 SHA-256: 1164f839b7af5f63c9cd750f7f3512c6778b37e382316d9f55be79d70634550b
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. It exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms, to achieve code execution. The PDF also contains embedded script payloads and an embedded file, suggesting it's designed to deliver a secondary malicious 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
6bfcac69c963b3e9f10c7f87423ccb9d0f66dcb85ff5a26d6112e16883aafe4c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101501 bytes

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