The sinobi ransomware group listed White Birch Paper on its data leak site on 2025-10-01. Country: US Sector: Manufacturing Domains named: www.whitebirchpaper.com Claim as published on the leak site: White Birch Paper produces high-quality paper and paperboard products. Through continuous investment in safety, sustainability and operations, they are able to thrive as a reliable partner that works with a sense of urgency to meet our customers’ needs and enable their success. It manufacture newsprint, recycled kraft paper, high-bright, paperboard and other specialty paper products at their four paper mills in Canada and the United States, where they serve customers throughout North America and across the world.