Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a2de895688e0a3…

MALICIOUS

PDF

14.7 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 4cb098db9fa37f036e9ae7ff3afa8386 SHA-1: 105685ca96ed3013e9d9fddee0ad1c4242807e42 SHA-256: 10a2de895688e0a33551748a4c6c8780bdc9e78504151c74a250b1eb0a1946fa
116 Risk Score

Malware Insights

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

The PDF file contains embedded scripts and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-81'. The ML classifier also strongly indicates maliciousness. The embedded script likely downloads and executes a secondary payload, which is a common attack pattern for this type of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://www.xfa.org/schema/xfa-form/2.8/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xci/1.0/
    • http://ns.adobe.com/xdp/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0016.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x521 56 bytes
embedded_file_obj0015.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x5B5 77 bytes
embedded_file_obj0014.bin
8801e0818570c9c98d63c208d0fae17da7f6e0d4f033825696bc7ca53091207f		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x65E 10463 bytes
embedded_file_obj0013.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x2F9C 199 bytes
embedded_file_obj0012.bin
3e104dc15468b8c85d8e2a69f27dbfdd3c3ca52699d1ef2352ed54e35c0dc849		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x30C0 1267 bytes
embedded_file_obj0011.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x3611 228 bytes
embedded_file_obj0010.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x3752 84 bytes

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