pdfopener.exe

Amptek Limited

The application pdfopener.exe by Amptek Limited 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 pdfopener.s3.amazonaws.com and multiple other hosts.
Publisher:
Amptek Limited  (signed and verified)

MD5:
15360d1a0dbc12c17c02dec97b681ec1

SHA-1:
70131e0cf6a16aab9ce4a1fd88b33c9fd5a927e3

SHA-256:
bd2bd3290b0c857660d0ef934cbd16d0c6b052ca37160c59ed28081493c6bcb3

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:
8/20/2018 9:46:59 AM UTC  (today)

Scan engine
Detection
Engine version

Dr.Web
Adware.Downware.1417
9.0.1.0232

ESET NOD32
Win32/Bundled.Toolbar.Ask (variant)
8.9848

Malwarebytes
PUP.Optional.Spigot.A
v2014.08.20.11

Reason Heuristics
PUP.AmptekLimited.J
14.11.21.23

File size:
2.2 MB (2,287,816 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

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

Digital Signature
Signed by:

Authority:
VeriSign, Inc.

Valid from:
6/7/2012 1:00:00 AM

Valid to:
10/13/2013 12:59:59 AM

Subject:
CN=Amptek Limited, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Amptek Limited, 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:
55B30AAE501ADA359698E3025A847E57

File PE Metadata
Compilation timestamp:
12/5/2009 10:50:46 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
49152:odX0eRm371087fAf3jA22U1rtlGsSOeS9mQWJmpvB6rP3QfySijs:UPEJ087fAfpNtxfPmQkmZ03QfySP

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.9633

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file pdfopener.exe has been seen being distributed by the following 3 URLs.

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