HalloweenPack_v1.5.zip is a release file of the Minecraft resource pack Default-Style Halloween Pack , made for Minecraft 1.17, 1.17-Snapshot. It was published on June 23, 2021 and is 4.5 MB in size. For the full description, screenshots and every other version, visit the Default-Style Halloween Pack resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.