Anyone see this weird plist in a MacBook Air running macOS Sonoma?

Yep, most likely Malware. To make sure that nothing is running on startup you can post the files located in these 3 folders. To get to the folders, go to Finder > Go > Go to Folder, and paste each location in there. Don't forget the "~" character at the start of the second folder:

/Library/LaunchDaemons

~/Library/LaunchAgents

/Library/LaunchAgents

Where are you seeing the plist?

BlueBerryMcMuffin wrote:

Has anyone seen this one before com.YdfeLVwz.plist?

Looks like malware.