If you are getting notifications from VirtualHybrid, then your Mac is infected with adware. VirtualHybrid is adware for Mac.
VirtualHybrid changes setting in your Mac. First, VirtualHybrid installs a browser extension in your browser. Then, after VirtualHybrid hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.