By Kwanwoo Jun

Woori Financial Group Inc.'s first-half profit fell 39% due to increased credit costs and weaker net interest margins amid the coronavirus pandemic.

Net profit for the six months through June 30 was 773.98 billion Korean won ($644.1 million) compared with KRW1.272 trillion during the same period a year earlier, the South Korean company said Monday.

Revenue rose 21% to KRW14.686 trillion thanks to steady loan growth, but operating profit dropped 31% to KRW1.172 trillion.

Write to Kwanwoo Jun at kwanwoo.jun@wsj.com