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pdflite.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 pdflite.exe by Best Download Manager has been detected as adware by 11 anti-malware scanners. During install, it bundles potentially unwanted software on a user's computer at the same time without adequate consent. The file has been seen being downloaded from api.kbm2.com and multiple other hosts.
Publisher:
Best Download Manager   (signed by Best Download Manager)

Product:
KBM2 Installer

Version:
2.5.1.0

MD5:
cbf20811ec3a25b6ba8a20b937d42877

SHA-1:
266e4d13089dc518b247f7d4e906ec4480c2aeb8

SHA-256:
1c45ac7ed84a08cd7177e3a486e9f89e09602723a0f09f8ed6d285e7e5cce3dd

Scanner detections:
11 / 68

Status:
Adware

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

Analysis date:
11/9/2024 12:31:32 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
AdInject.Bdmngr
2016.0.3049

Dr.Web
Adware.Plugin.85
9.0.1.0194

ESET NOD32
Win32/KBM (variant)
9.10660

G Data
Win32.Application.Kbm
15.7.24

IKARUS anti.virus
PUA.KBM
t3scan.1.8.3.0

Malwarebytes
PUP.Optional.BundleInstaller.A
v2015.07.13.07

McAfee
Artemis!CBF20811EC3A
5600.6705

NANO AntiVirus
Riskware.Win32.Plugin.cxiows
0.28.6.62995

Reason Heuristics
PUP.Yontoo.BestDownloadManager.Installer (M)
15.7.13.15

VIPRE Antivirus
sterkly LLC
34472

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}\downloads\pdflite.exe

Digital Signature
Signed by:
Best Download Manager

Authority:
VeriSign, Inc.

Valid from:
7/25/2013 1:00:00 AM

Valid to:
7/26/2015 12:59:59 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:
8/7/2013 8:25:15 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:7gq6uX5c0RzWguzZylIAllGVytvHdKme7IZopYSQfg:7R610ZluglqytYmesZoxQ4

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:
6.2559

Code size:
342.5 KB (350,720 bytes)

The file pdflite.exe has been seen being distributed by the following 2 URLs.

http://api.kbm2.com/downloadLauncher.ashx?cid=1234

http://www.pdflite.com/download

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