Another angle: "Darling" might be part of a title for a PDF-related project, like a document or a tutorial. Maybe it's a guide or book titled "Darling's Venom PDF Guide" or something similar. Without more context, it's a bit tricky. The user mentioned "proper guide covering 'darling venom pdf'," so perhaps it's about using a PDF tool named venom, addressed to someone called Darling.