pdfu.exe

Krance Development

This adware is a web browser extension that will inject advertising in the browser in the form of unwanted banners and text-links which may link to malware sites and install unwanted software. The application pdfu.exe, “Object Browser exe” by Krance Development has been detected as adware by 11 anti-malware scanners. It runs as a scheduled task under the Windows Task Scheduler triggered to execute each time a user logs in. It is built using the Crossrider cross-browser extension toolkit. While the file utilizes the Crossrider framework and delivery services, it is not owned by Crossrider. It is part of the Brightcircle group of web-extensions that inject advertisements in the browser.
Publisher:
Object Browser  (signed by Krance Development)

Product:
Object Browser

Description:
Object Browser exe

Version:
1000.1000.1000.1000

MD5:
7f2d4e3de029855ffe000822aa01c482

SHA-1:
cabfa2aed4508eb3c061ab6193843556f308f87e

SHA-256:
55fcc43780a1b155a113fc6aede4702d957c8d2154a317181d9c021586ad9e05

Scanner detections:
11 / 68

Status:
Adware

Explanation:
May modify the web browser's settings including changing the homepage and search provider in addition to delivering ads (by injecting banner and text-links directly in the webpage).

Analysis date:
12/28/2024 5:47:09 AM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.CrossRider
2014.10.06

AVG
Generic
2015.0.3329

ESET NOD32
Win32/Toolbar.CrossRider.AV (variant)
8.10518

F-Prot
W32/A-9e906728
v6.4.7.1.166

Kaspersky
not-a-virus:AdWare.NSIS.Adwapper
14.0.0.3133

Malwarebytes
PUP.Optional.ObjectBrowser.A
v2014.10.06.03

McAfee
Artemis!914602E6CF0B
5600.6984

Panda Antivirus
Trj/Genetic.gen
14.10.06.03

Qihoo 360 Security
HEUR/Malware.QVM10.Gen
1.0.0.1015

Reason Heuristics
Threat.Win.Reputation.IMP
14.10.8.11

VIPRE Antivirus
Crossrider
33702

File size:
1.5 MB (1,520,544 bytes)

Product version:
1000.1000.1000.1000

Copyright:
Copyright 2011

Original file name:
Object Browser.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\roaming\pdfu.exe

Digital Signature
Authority:
COMODO CA Limited

Valid from:
8/27/2014 8:00:00 PM

Valid to:
8/28/2015 7:59:59 PM

Subject:
CN=Krance Development, O=Krance Development, STREET=Athinodorou 3, STREET=Dasoupoli Strovolos, L=Nicosia, S=Cyprus, PostalCode=2025, C=CY

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
2F8A4746EB05936853BC17805C72D300

File PE Metadata
Compilation timestamp:
10/5/2014 3:34:50 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
24576:mdAA094g0ZMq1XuxIQKIII7DdFgFQoxOyT89540anjqAwPxigpSlrTOHCo:mdbnZx1Q5Xgy4dTq40/igpSlrTzo

Entry address:
0xEE760

Entry point:
E8, C3, 00, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 56, 8B, 75, 08, 85, F6, 78, 09, E8, F6, 01, 01, 00, 3B, 30, 7C, 07, E8, ED, 01, 01, 00, 8B, 30, E8, E0, 01, 01, 00, 8B, 04, B0, 5E, 5D, C3, 55, 8B, EC, 56, E8, 34, 5F, 00, 00, 8B, F0, 85, F6, 75, 07, B8, 40, 25, 55, 00, EB, 26, 53, 57, 33, FF, BB, 86, 00, 00, 00, 39, 7E, 24, 75, 1B, 6A, 01, 53, E8, 7E, 31, 00, 00, 59, 59, 89, 46, 24, 85, C0, 75, 0A, B8, 40, 25, 55, 00, 5F, 5B, 5E, 5D, C3, FF, 75, 08, 8B, 76, 24, E8, 90, FF, FF, FF, 50, 53, 56, E8, 3F, EE...
 
[+]

Entropy:
6.6049

Code size:
1.1 MB (1,142,272 bytes)

Scheduled Task
Task name:
PDFU

Trigger:
Logon (Runs on logon)

Action:
pdfu.exe \infocmdline=by1v+sgh84mciite8f6yjbnj7dqtgvemwjatk


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

TCP (HTTP):
Connects to ip-50-63-202-33.ip.secureserver.net  (50.63.202.33:80)

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