The icon shows a sheet of paper with a folded corner and the letters "EXE" displayed as the text, which may stand for execute. The icon most likely represents a file type and icon for that file to be opened stored on a computer.
This is a EXE Filled icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.