PDF malware analysis — malicious · 2f25895465810c54

MALICIOUS

PDF

18.4 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: bcebd73fb08935acaecfa7fa49bc8c5b SHA-1: aa2dc1e48947bc2f326c0c8db79a05db7d071d9c SHA-256: 2f25895465810c54c5604ee83f13c6d3b48c933beee48e85f9022af38c6c62cc

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded script payloads and is flagged by ML classifiers and ClamAV as malicious. The ClamAV detection name 'Pdf.Exploit.Dropped-81' suggests it's a known exploit dropper. The presence of XFA forms with executable scripts indicates an attempt to execute arbitrary code, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
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 0x2C9	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x37A	228 bytes
`embedded_file_obj0010.bin` `4741ec8e4f4f8dc5ba5378898cb43f3836ba625e1d42a6e8d9c1335ef1d1b84a`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x46D	1459 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x7C2	199 bytes
`embedded_file_obj0012.bin` `a354b1a85943abd274e58f61862595a6ee936220ad9dacdf60d425020bf2c017`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x8B4	34177 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4342	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x43E9	56 bytes

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