Is this malware?
No. This is a legitimate connection error from the official CleanMyMac software. While malware can disguise itself with generic names, appdozedmg is consistent with MacPaw's naming conventions for temporary update files. The "504" error code confirms that a connection attempt was made to a web server, which is behavior typical of a legitimate updater, not malicious payload injection.
Open Terminal and run:
rm -rf ~/Library/Caches/com.macpaw.CleanMyMac-X/
rm -rf ~/Library/Application\ Support/CleanMyMac\ X/
These folders often store the outdated 504-triggering manifests. cleanmymac 504 appdozedmg updated
Finder → Applications.CleanMyMac X (if present) to Trash.AppDoze in Spotlight. Delete any files named AppDoze.dmg or AppDoze Stub.