Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bac6acfbaa8f86…

MALICIOUS

PDF

99.5 KB
MD5: 7c6bf955aa14667c59a77919737394b4 SHA-1: 4abd367b22bf209c513956bb09653c574d4f5e42 SHA-256: 76bac6acfbaa8f86e9c6474fa113d4b45c5d83b12d0fa68b1fdee4dc9089269f
116 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader's handling of XFA forms. This exploit is designed to achieve code execution on the victim's machine. The presence of embedded script payloads further supports the malicious intent, likely to download and execute a secondary stage. No specific family could be identified.

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
e8b758cbe984f0666d375b007e508b2b0ac7e9488ec5d5a68c076b9e9115ecb3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101140 bytes

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