In other events, Sin finished fifth in the 7.5km and 12.5km biathlon events, and took sixth place in the 1.1km sprint cross-country skiing.
Hall paid tribute to his late mother Gayle Hall who was killed in a auto accident in 2010, not long after he won his first Olympic gold medal in Vancouver.
The 30-year-old will return home with two medals in Korea, having claimed bronze in the Super combined event.
"I am delighted to be part of the history of Croatian performances at the Winter Paralympics by winning the first medal for my homeland, and I dedicate this success to my parents, trainers and all those who believed in me", said Bošnjak.
After Mark Arendz missed the top of the Paralympic medal podium four years ago in Sochi, he harnessed that frustration in every training session.
The United States' Jamie Stanton had to settle for the bronze medal in 1:37.37, despite leading after the first run.
However, his second run time 47.42sec was better than anybody in the field. American Jamie Stanton was third.
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"This Paralympic gold is dedicated to my wife Barbara and daughter Vita", concluded the new Paralympic champion Dino Sokolović.
It capped a remarkable 24 hours for Hall, who was born with spina bifida.
He is the victor of the Whang Yuon Dai Achievement Award, awarded to just one male and one female athlete at each summer and winter Paralympics since 1988.
The award is given to those who best represent the spirit of the games.
Organisers said Hall was honoured because of his work with the disabled community in New Zealand.
I encourage all Canadians to join me in cheering on Mark Arendz and our Paralympic team as they enjoy these last memorable moments at the Games, and as they march in the stadium for the closing ceremony tomorrow evening!