Md Mahfuzur Rahman was reportedly charged with
- being in possession of over $100,000 in the proceeds of crime,
- four counts of possessing a false foreign passport (a maximum jail sentence of 10 years),
- one count of being in possession of false identification (maximum sentence of five years).
The brief account provides insufficient information for much analysis and Rahman has of course been reportedly charged rather than convicted, so we can only speculate about the $100k.
Potential precedents for prosecution under s 21 of the Foreign Passports (Law Enforcement and Security) Act 2005 (Cth) for possession of a false foreign passport include Tomov v The Queen  WASCA 189, Nikaghanri v The State of Western Australia  WASCA 192 and Salman v Director of Public Prosecutions (Cth)  NSWCCA 192.