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sumatra-pdf.exe

dobreprogramy sp. z o.o.

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application sumatra-pdf.exe by dobreprogramy sp. z o.o 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 installCore installer. The file has been seen being downloaded from download4.dobreprogramy.pl.
Publisher:
dobreprogramy sp. z o.o.  (signed and verified)

MD5:
b1e270a30acf61f56b738c7264cf076d

SHA-1:
7254d4d6ec3abab428f07952aa8ca86e617b1b9d

SHA-256:
dacd3ede3af891991d7133b477b82ba8d10ac451465b68cccf1d7e94e46f9ace

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.

Description:
This 'download manager' is also considered bundleware, a utility designed to download software (possibly legitimate or opensource) and bundle it with a number of optional offers including ad-supported utilities, toolbars, shopping comparison tools and browser extensions.

Analysis date:
4/18/2024 11:57:11 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore (M)
16.7.27.17

File size:
648.9 KB (664,472 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Common path:
C:\users\{user}\downloads\sumatra-pdf.exe

Digital Signature
Signed by:
dobreprogramy sp. z o.o.

Authority:
COMODO CA Limited

Subject:
CN=dobreprogramy sp. z o.o., O=dobreprogramy sp. z o.o., STREET=Al. Jana Kasprowicza 94, L=Wrocław, S=dolnośląskie, PostalCode=51-145, C=PL

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

Serial number:
00EFC6EDE5717968B796D7BFF8BE2536E9

File PE Metadata
Compilation timestamp:
6/20/1992 12:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:A7yMJfsGiW7JnRYOYtoBaRxVfzYk3NFu5L324NpyC+d4Yex1e0TeaBlJiF6hr:A7yMJfs0tWRcoJPnu5L10AxVeaPJs6

Entry address:
0x98CC

Entry point:
55, 8B, EC, 83, C4, CC, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, FA, 97, FF, FF, E8, 01, AA, FF, FF, E8, 2C, CC, FF, FF, E8, 73, CC, FF, FF, E8, 0A, F3, FF, FF, E8, 71, F4, FF, FF, 33, C0, 55, 68, 76, 9F, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 2C, 9F, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, B0, 40, 00, E8, 9B, FE, FF, FF, E8, 26, FA, FF, FF, 8D, 55, F0, 33, C0, E8, E0, D0, FF, FF, 8B, 55, F0, B8, D8, BD, 40, 00, E8, AB, 98, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, D8, BD, 40, 00, B2, 01, B8...
 
[+]

Entropy:
7.8544

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
36 KB (36,864 bytes)

The file sumatra-pdf.exe has been seen being distributed by the following URL.

http://download4.dobreprogramy.pl/.../x86

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