RAR archive named for the ASUS UX5401ZA model, with an F1 suffix the name does not explain; the type of contents is not stated. At 7.52 MB it is the right size for a firmware package, but open it first to see whether it holds a BIOS dump, boardview or schematic. If it holds a dump, save the original SPI chip before writing, confirm the image size matches the flash, and check that the board revision on the PCB fits the file.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @vinafix_bios. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)