PUP.Optional.PDFFlex

Short bio

PUP.Optional.PDFFlex is Malwarebytes’ detection name for a potentially unwanted program (PUP) which is advertized as a free online file converter.

Symptoms

Users may spot a new folder at %LOCALAPPDATA%\PDFFlex

Type and source of infection

Users reported finding the local files on their computer after using the online converter.

Protection

Malwarebytes protects users by detecting and removing the %LOCALAPPDATA%\PDFFlex folder.

Remediation

Malwarebytes can detect and remove PUP.Optional.PDFFlex without further user interaction.

Please download Malwarebytes to your desktop.
Double-click MBSetup.exe and follow the prompts to install the program.
When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
Click on the Get started button.
Click Scan to start a Threat Scan.
Click Quarantine to remove the found threats.
Reboot the system if prompted to complete the removal process.

Add an exclusion

Should users wish to keep this program and exclude it from being detected in future scans, they can add the program to the exclusions list. Here’s how to do it.

Open Malwarebytes for Windows.
Click the Detection History
Click the Allow List
To add an item to the Allow List, click Add.
Select the exclusion type Allow a file or folder and use the Select a folder button to select the main folder for the software that you wish to keep.
Repeat this for any secondary files or folder(s) that belong to the software.