I have a suspect malware app and can't remove it to trash bin What do I have to do?

Exactly what makes the User believe this is Malware ?

Is the computer acting oddly?

Is the Browser being redirected ?

Has the user downloaded and installed some software recently from an unknown developers ?

There is Adware & Malware which will affect the computer and is generally downloaded from “ Shady “ Websites or Developers who Inject this software into the download.

Should “ Certain & Specific Software “ referenced from above be installed - it will negatively impact macOS. It is suggested, download directly from the Developer , the application Malwarebytes for Mac. 

It is free or paid for added features. 

Run the Application and it should remove the malware / adware. Once done, restart computer and test.

I'd suggest the free version of Malwarebytes.

https://www.malwarebytes.com