There are going to be any number of apps and processes concurrently running in your phone all the time. That's how any operating system functions. And most of those things will have what appear to be odd naming to you but have real relevance to the developer/coder using it. DRParser is just a Samsung utility, something run typically runs in the background that you as a user don't typically interact with. More details here if you really feel compelled to dig more into it:
https://candid.technology/drparser/
But really, you're better off just leaving that alone as is, in for your own mental health stop trying to create problems by fixating on all the things the Android operating system does in the background.