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pdfviewerinstall.exe

United Starex Limited

The application pdfviewerinstall.exe by United Starex Limited has been detected as a potentially unwanted program by 2 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This version of the installer will bundle the Ask.com Toolbar, a potentially unwanted web browser extension. The file has been seen being downloaded from d37rv1r1ek13ea.cloudfront.net.
Publisher:
United Starex Limited  (signed and verified)

MD5:
ab12fbe615237bc74538962ebc086601

SHA-1:
64e837fc8333ca6cb8f750dcefbe28032fca38d3

SHA-256:
4a3ad90ab1852305caee024ad075da1ea00f675d4d3f95de008c18d5fda1ad19

Scanner detections:
2 / 68

Status:
Potentially unwanted

Explanation:
Bundles that Ask.com toolbar as a third-party offer, a web browser extension that may modify a user's search and home pages.

Analysis date:
4/18/2024 1:16:38 PM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/Bundled.Toolbar.Ask (variant)
8.8945

Reason Heuristics
PUP.UnitedStarex.Installer.Meta (M)
16.2.27.17

File size:
1.9 MB (2,044,032 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\pdfviewerinstall.exe

Digital Signature
Signed by:
United Starex Limited

Authority:
VeriSign, Inc.

Valid from:
9/26/2010 7:00:00 PM

Valid to:
9/27/2011 6:59:59 PM

Subject:
CN=United Starex Limited, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=United Starex Limited, L=Hong Kong, S=Hong Kong, C=HK

Issuer:
CN=VeriSign Class 3 Code Signing 2009-2 CA, OU=Terms of use at https://www.verisign.com/rpa (c)09, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
6A89ECC09433127281B9C060C25A41E0

File PE Metadata
Compilation timestamp:
12/5/2009 4:50:41 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
49152:Ea3QvZ0CUN3elvSJaixfEwCyprM5JTR9vR2vmfE:Ea3j3eVSJauEbkUR9p2l

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 3F, 42, 00, E8, F1, 2B, 00, 00, A3, 84, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 36, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9566

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file pdfviewerinstall.exe has been seen being distributed by the following URL.

http://d37rv1r1ek13ea.cloudfront.net/PDFViewerInstall.exe

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