VirusTotal has 5 hits

rcwiCUNA

The hash 40b22c8bb0b6b338a3de56989e28829266db948be5af74ab1337e53e1aee2a06
Linqer.exe

Had an enduser download and launch, Cisco Secure Endpoint stopped it. Is this a valid file?

sgmoore

Have they downloaded the wrong program?

As far as I know Linqer has nothing to do with LinqPad, so you are unlikely to get an authoritative answer here and it might be better to ask at https://sqltolinq.com/forum