PDF malware analysis — malicious · 3c73080904a4f5c4

MALICIOUS

PDF

6.6 KB Created: 2010-08-29 16:19:36 Authoring application: _GB

MD5: a0e201a09ca1a5b71adad91d61daedf2 SHA-1: d0248bdeda849207670c624f408d304dc7dc19a7 SHA-256: 3c73080904a4f5c4bd2e68522e29f3fef7a2c724856761eea3e158c0867c4eb6

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV detection and high ML classifier score indicate maliciousness. The PDF contains embedded files and a script payload, suggesting it's designed to exploit a vulnerability and download a secondary stage. The specific ClamAV detection name 'Pdf.Exploit.Dropped-81' points to a known exploit targeting PDF viewers.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
Embedded script payload in PDF stream medium 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 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

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x201	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2AF	228 bytes
`embedded_file_obj0010.bin` `ad69954eeb9556917d1ec8428da28e80aca0f2c68edc90c1c71d8e07f4b3fb08`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x39D	1051 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x673	199 bytes
`embedded_file_obj0012.bin` `ed66750c3f4af07d94ea6c441ed3eb7730d4334aac10c04a88dd2d1ac82ece0e`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x762	39700 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x15F3	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1697	56 bytes

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