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pdflockersetup.exe

KBM2 Installer

Best Download Manager

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application pdflockersetup.exe by Best Download Manager has been detected as adware by 8 anti-malware scanners. During install, it bundles potentially unwanted software on a user's computer at the same time without adequate consent. It is also typically executed from the user's temporary directory. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Best Download Manager   (signed by Best Download Manager)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
ae7eee11f1edb04741b1d060218c2cdc

SHA-1:
a018ac53fcd0ededc53374f0073ca45ab0758264

SHA-256:
e5068d2da0da5def7f452b5f3ed443fbacf14a9f0fd23d801f211f48f4e27429

Scanner detections:
8 / 68

Status:
Adware

Explanation:
May bundle additional potentially unwanted software such as adware during setup.

Analysis date:
4/20/2024 3:55:13 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
Adware AdInject.Bdmngr
2014.0.3955

Dr.Web
Adware.Plugin.85
9.0.1.05190

ESET NOD32
Win32/KBM.A potentially unwanted application
7.0.302.0

Malwarebytes
PUP.Optional.BundleInstaller.A
v2014.06.09.10

NANO AntiVirus
Riskware.Win32.Plugin.cxiows
0.28.0.60100

Reason Heuristics
PUP.Installer.BestDownloadManager.O
14.8.8.0

VIPRE Antivirus
Threat.4782986
30086

File size:
541.6 KB (554,632 bytes)

Product version:
2.5.1.0

Copyright:
(c) Best Download Manager . All rights reserved.

Original file name:
KBM2.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\pdflockersetup.exe

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/25/2013 8:00:00 AM

Valid to:
7/26/2015 7:59:59 AM

Subject:
CN=Best Download Manager, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Best Download Manager, L=Carlsbad, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
5F3BBF9CAABCE7C81AB69ABF7371A064

File PE Metadata
Compilation timestamp:
8/8/2013 3:25:15 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:Fgq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYlpQAF:FR610ZluglqytYmesZo6pQG

Entry address:
0x3A3C0

Entry point:
E8, 0E, 6F, 00, 00, E9, 89, FE, FF, FF, 3B, 0D, D0, 0B, 47, 00, 75, 02, F3, C3, E9, 95, 6F, 00, 00, 8B, FF, 55, 8B, EC, 56, 8B, 75, 14, 85, F6, 75, 04, 33, C0, EB, 61, 83, 7D, 08, 00, 75, 13, E8, D9, 35, 00, 00, 6A, 16, 5E, 89, 30, E8, 6C, 75, 00, 00, 8B, C6, EB, 48, 83, 7D, 10, 00, 74, 16, 39, 75, 0C, 72, 11, 56, FF, 75, 10, FF, 75, 08, E8, 66, 70, 00, 00, 83, C4, 0C, EB, C7, FF, 75, 0C, 6A, 00, FF, 75, 08, E8, B4, 31, 00, 00, 83, C4, 0C, 83, 7D, 10, 00, 74, BB, 39, 75, 0C, 73, 0E, E8, 8F, 35, 00, 00, 6A...
 
[+]

Entropy:
6.2248

Code size:
342.5 KB (350,720 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to wac.edgecastcdn.net  (72.21.81.13:80)

TCP (HTTP):
Connects to service.yontoo.com  (8.25.35.148:80)

TCP (HTTP):
Connects to api.yontoo.com  (8.25.35.15:80)

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