pass off (someone's) work as (your) own

Translations
выдать (чью-то) работу за (свою) собственную
She got caught trying to pass off her colleague's work as her own.
Ее поймали на попытке выдать работу коллеги за свою собственную.
Definitions
To claim that someone else's work, ideas, or creations are your own, typically by presenting or submitting them without giving proper credit to the original creator.