Malicious PDF — malware analysis report

Static analysis result for SHA-256 681e57d5d9221be6…

MALICIOUS

PDF

99.7 KB
MD5: b4c1b12f0920e98b8833de9e7700ca71 SHA-1: 2a3c65c3df3f2521f48cd01561254aaf6639c99e SHA-256: 681e57d5d9221be636c98874a553a99190a99fd5a0f8b4fb68729bb20844fc54
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 a machine learning classifier. It exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms, to achieve code execution. The presence of an embedded file and the nature of the exploit suggest it is likely delivered via spearphishing, aiming to compromise the user's system.

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
490f62df7c601c5741f946b5eb65a1e7bc8d286f703576b1d5d3fd1254c41425		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101374 bytes

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