PUA_EASYPDFCOMBINE.GA

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

It modifies the user's Internet Explorer home page into a certain website. This action allows the malware to point to a website which may contain malware, putting the affected computer at greater risk of malware infection.

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

• %User Temp%\ns{random}.tmp\nsDialogs.dll
• %User Temp%\ns{random}.tmp\System.dll
• %User Temp%\ns{random}.tmp\installerParams
• %User Temp%\ns{random}.tmp\reporting
• %User Temp%\ns{random}.tmp\secondary_bg.png
• %User Temp%\ns{random}.tmp\secondary_accept.png
• %User Temp%\ns{random}.tmp\secondary_decline.png
• %User Temp%\ns{random}.tmp\Progress-BackGround-german_1512502843041.bmp
• %User Temp%\ns{random}.tmp\Primary-Browser-Background-german_1512502832099.bmp
• %User Temp%\ns{random}.tmp\cancel_german_1512500948475.bmp
• %User Temp%\ns{random}.tmp\Install_german_1512500939136.bmp
• %AppDataLocal%\EasyPDFCombineTooltab\TooltabExtension.dll

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)

It creates the following folders:

• %User Temp%\ns{random}.tmp
• %AppDataLocal%\EasyPDFCombineTooltab

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)

Other System Modifications

This Potentially Unwanted Application adds the following registry keys:

HKEY_CURRENT_USER\Software\EasyPDFCombine

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer

It adds the following registry entries:

HKEY_CURRENT_USER\Software\EasyPDFCombine
Start Page = http://hp.myway.com/easypdfcombine/lmdede/index.html?n=C0759B5&p2=^BSB^mni000^LMDEDE&ptb={value}&coid={id}

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = http://hp.myway.com/easypdfcombine/lmdede/index.html?n=C0759B5&p2=^BSB^mni000^LMDEDE&ptb={value}&coid={id}

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer
DisplayName = EasyPDFCombine Internet Explorer Homepage and New Tab

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer
UninstallString = Rundll32.exe "%AppDataLocal%\EasyPDFCombineTooltab\TooltabExtension.dll" U uninstall:EasyPDFCombine

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer
Publisher = Mindspark Interactive Network, Inc.

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer
HelpLink = http://support.mindspark.com/

KEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
EasyPDFCombineTooltab Uninstall Internet Explorer
URLInfoAbout = http://support.mindspark.com/

KEY_CURRENT_USER\Software\EasyPDFCombine
UnInstallSurveyUrl = http://@{downloadDomain}.dl.myway.com/uninstall.jhtml?c={value}&ptb=^BSB^mni000^LMDEDE

Web Browser Home Page and Search Page Modification

This Potentially Unwanted Application modifies the user's Internet Explorer home page to the following websites:

• http://hp.{BLOCKED}y.com/easypdfcombine/lmdede/index.html?n=C0759B5&p2=^BSB^mni000^LMDEDE&ptb={value}&coid={id}

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

• http://dp.tb.{BLOCKED}k.com:443
• http://anx.{BLOCKED}ark.com/anx.gif?anxa=CAPDownloadProcess&anxe=Error&errorCode=-13&errorType=nsisError&errorDetails=EmptyPartnerId&platform=vicinio&anxv=2.7.1.3000&anxd=2018-08-16&coid={ID}&refPartner=^BSB^mni000^LMDEDE&refSub=&anxl=en-US&anxr=2046077079&refCobrand=BSB&refCampaign=mni000&refTrack=LMDEDE&refCountry=
• http://anx.{BLOCKED}ark.com/anx.gif?anxa=CAPDownloadProcess&anxe=InstallerInvoked&platform=vicinio&anxv=2.7.1.3000&anxd=2018-08-16&coid={ID}&refPartner=^BSB^mni000^LMDEDE&refSub=&anxl=en-US&anxr=-2077565099&refCobrand=BSB&refCampaign=mni000&refTrack=LMDEDE&refCountry=
• http://anx.{BLOCKED}ark.com/anx.gif?anxa=CAPDownloadProcess&anxe=InstallerFinished&tbUID={ID}&tbVer=&platform=vicinio&anxv=2.7.1.3000&anxd=2018-08-16&coid={ID}&refPartner=^BSB^mni000^LMDEDE&refSub=&anxl=en-US&anxr=2055290422&refCobrand=BSB&refCampaign=mni000&refTrack=LMDEDE&refCountry=