I reverse searched the high res image and found a stock image that matches pixel by pixel and I refuse to believe that high.jpg was generated from low.jpg.
https://www.shutterstock.com/shutterstock/photos/2346215871/display_1500/stock-photo-adventure-amazing-landscape-nature-photography-2346215871.jpg
https://www.upscayl.org/high.jpg
https://www.upscayl.org/low.jpg