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pdfreader_setup.exe

DownloadShield

The application pdfreader_setup.exe by DownloadShield has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from www.opendownload.us.
Publisher:
DownloadShield  (signed and verified)

MD5:
609e804d22b8b3f8ba563db2f2183175

SHA-1:
de16d85ad2ffb3d18d43f0efb9834b2638853ebc

SHA-256:
460cfba3af75edbac189ce28bb80e5805e0f6e2e5e904d039f235d58d7b48bff

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
11/30/2024 9:00:39 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP (M)
16.7.18.19

File size:
231.6 KB (237,112 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\pdfreader_setup.exe

Digital Signature
Signed by:
DownloadShield

Authority:
VeriSign, Inc.

Valid from:
12/21/2015 7:00:00 PM

Valid to:
3/21/2019 7:59:59 PM

Subject:
CN=DownloadShield, O=DownloadShield, L=San Jose, 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:
78070F8D972292519C0C15749BCB3808

File PE Metadata
Compilation timestamp:
8/3/2015 10:43:56 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
6144:P0hNL3AVfvYZsFiv6BtgZHbGYXwj5484rLB:MDpZssG2ZyYXU4f

Entry address:
0x31FD

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 57, 33, DB, 68, 01, 80, 00, 00, 89, 5C, 24, 1C, C7, 44, 24, 14, F0, 73, 40, 00, 33, F6, C6, 44, 24, 18, 20, FF, 15, B4, 70, 40, 00, FF, 15, B0, 70, 40, 00, 66, 83, F8, 06, 74, 11, 53, E8, F3, 26, 00, 00, 3B, C3, 74, 07, 68, 00, 0C, 00, 00, FF, D0, 68, E8, 73, 40, 00, E8, 74, 26, 00, 00, 68, E0, 73, 40, 00, E8, 6A, 26, 00, 00, 68, D4, 73, 40, 00, E8, 60, 26, 00, 00, 6A, 0D, E8, C3, 26, 00, 00, 6A, 0B, E8, BC, 26, 00, 00, A3, 00, 3C, 42, 00, FF, 15, 34, 70, 40, 00, 53, FF...
 
[+]

Entropy:
7.6795

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

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

http://www.opendownload.us/.../PDFReader_Setup.exe

Remove pdfreader_setup.exe - Powered by Reason Core Security
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