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freepdfreader_installer.exe

Tripro Ltd

The application freepdfreader_installer.exe by Tripro has been detected as adware by 4 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 www.pdfwork.com.
Publisher:
Tripro Ltd  (signed and verified)

MD5:
81a2e3396289b7d7ef6b5404b866c542

SHA-1:
fcc1e7593e1225b75ee49a74e44832540be48cac

SHA-256:
5334784a2b407a9c05258ab2f12f894dba2221b81798e0df72d4dd643dd6e55b

Scanner detections:
4 / 68

Status:
Adware

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:
4/26/2024 2:18:14 PM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/Bundled.Toolbar.Ask.G potentially unsafe (variant)
9.11286

K7 AntiVirus
Unwanted-Program
13.200.15196

Reason Heuristics
PUP.Installer.Tripro
15.3.9.18

Trend Micro House Call
Suspicious_GEN.F47V0306
7.2.68

File size:
3.8 MB (3,978,080 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\content.ie5\ef0habd4\freepdfreader_installer.exe

Digital Signature
Signed by:
Tripro Ltd

Authority:
VeriSign, Inc.

Valid from:
9/29/2013 7:00:00 PM

Valid to:
9/30/2015 6:59:59 PM

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

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:
1189C239E85299F4464322E094264D91

File PE Metadata
Compilation timestamp:
2/24/2012 1:20:04 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
98304:gO9r1aGa229btDbMR384h96ZSJL21/ZUTo7O:gOh1ap2kWFT9ry16

Entry address:
0x38AF

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, 68, A2, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 90, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 90, 40, 00, 55, FF, 15, C0, 92, 40, 00, 6A, 08, A3, 98, EB, 47, 00, E8, 36, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, B0, EA, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 64, A2, 40, 00, FF, 15, 84, 91, 40, 00, 68, 4C, A2, 40, 00, 68, A0, 6A, 47, 00, E8, 18, 27, 00, 00, FF, 15, B0, 90, 40, 00, 50, BF, A0, F0, 4C, 00, 57, E8, 06, 27, 00, 00...
 
[+]

Entropy:
7.9826

Packer / compiler:
Nullsoft install system v2.x

Code size:
29 KB (29,696 bytes)

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

http://www.pdfwork.com/FreePDFReader_Installer.exe

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