Dark.zip is a release file of the Minecraft resource pack Co-Op Light and Dark - Dark, made for Minecraft 1.7.10. It was published on March 17, 2021 and is 2.5 MB in size. For the full description, screenshots and every other version, visit the Co-Op Light and Dark - Dark resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.