PDF malware analysis — malicious · b64fa39612071f7e

MALICIOUS

PDF

6.5 KB Created: 2010-08-29 16:19:36 Authoring application: _QS

MD5: 277740c23f0e3ac471aec0b0dd1c4158 SHA-1: 9044f33e0d3fe7b88a10e83d4e79e535df0fe8d7 SHA-256: b64fa39612071f7ed71c0b13dce8731170e9fdf15e21d83215414022d1882812

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-81' and an ML classifier indicating high maliciousness. The presence of an embedded script payload (PDF_EMBEDDED_SCRIPT_PAYLOAD) strongly suggests the document is designed to execute malicious code. The embedded artifacts further support the malicious nature of the file, likely serving as a dropper for further stages of an attack.

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 0x202	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2B0	228 bytes
`embedded_file_obj0010.bin` `6c93069cfac3258825039f7c3c42a953edc99a3969baed1c775099cbdddd1644`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x39E	917 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x622	199 bytes
`embedded_file_obj0012.bin` `4dcc6d7aa6f52ab6ca5ec69b7b0f88d394647cf0abc278d1e69db4f764ef4ec8`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x711	36318 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1596	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x163A	56 bytes

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