Moric, a Sydney United 58 junior, came through the FFA Centre of Excellence.
An Australian Under-17 representative, he joined the Newcastle Jets on a two-year scholarship deal in January last year.
Now the 18-year-old striker has linked with top Croatian First League side Rijeka, who finished second in the Prva HNL last season.
Moric is the son of former Sydney United and Olyroo midfielder Ante Moric.