Do not risk your PC's security for this version. Save $20 and buy the base game on a key reseller site (like Green Man Gaming or Fanatical) during a sale. The peace of mind and access to online Kombat League are worth infinitely more than a virus-ridden executable claiming to be "v1.3.0 gratis."
If you hypothetically possessed the legitimate game files for v1.3.0, here is the content you would unlock: Mortal Kombat 1 PC Download gratis -v1.3.0-
The game is available through major digital storefronts, which frequently offer significant discounts: Do not risk your PC's security for this version