If you do not want to manually extract files, several community repositories host clean copies of vanilla resource packs.
How to Download the Minecraft Default Texture Pack for 1.8.9 If you are a PvP enthusiast or a fan of the classic "Golden Age" of Minecraft, version 1.8.9 is likely your go-to. However, sometimes files get corrupted, or you might want the raw default textures to use as a base for your own custom resource pack. Finding a clean, untouched version of the original textures can be surprisingly tricky. Here is the straightforward guide on how to get the official
Navigate to assets/minecraft/textures/
Technically, you do not need to download a "pack" to use default textures. Minecraft automatically loads these textures from its internal files. However, downloading a zip file of the default textures is useful for: