** Shares of Hazer Group HZR.AX rise as much as 3.3% to A$0.465, posting their biggest intraday pct gain since November 25

** Environmental services company says it has extended its existing non-binding MoU with South Korea's POSCO Steel 058430.KS for a further two years

** Extension sets out next steps in preparing a project pathway for the integration of Hazer's technology into POSCO's proprietary low-carbon steel process, says co

** Stock at highest level since November 28

** HZR currently up 2.8%, bringing YTD gains to 23.3%

(Reporting by Adwitiya Srivastava in Bengaluru)

((Adwitiya.Srivastava@thomsonreuters.com))