Malicious PDF — malware analysis report

Static analysis result for SHA-256 026dd23d6b938d1d…

MALICIOUS

PDF

5.9 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: b34ca19dbccd3552906f810255da7d9f SHA-1: 422b39d9d2133a1b184063fb7db073ac851f5d0b SHA-256: 026dd23d6b938d1d51c3c44276428d11d3927f40139fe97c36285f84e70d9411
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV with the signature 'Pdf.Exploit.Dropped-81', indicating it exploits a known vulnerability to deliver a payload. The presence of embedded files and scripts, along with the ML classifier's high confidence, strongly suggests this is an exploit document designed to execute arbitrary code. The embedded script likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0006.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x234 84 bytes
embedded_file_obj0007.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x2E9 228 bytes
embedded_file_obj0008.bin
3e104dc15468b8c85d8e2a69f27dbfdd3c3ca52699d1ef2352ed54e35c0dc849		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x3DD 1267 bytes
embedded_file_obj0009.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x718 199 bytes
embedded_file_obj0010.bin
8801e0818570c9c98d63c208d0fae17da7f6e0d4f033825696bc7ca53091207f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x80F 10463 bytes
embedded_file_obj0011.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x114D 77 bytes
embedded_file_obj0012.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x11F8 56 bytes

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