This is a Spider 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 13,000 icons, all in the same style and quality.
Idea of Spider Icon by Siska
We've received the idea on September 14, 2013 and created the icons on November 12, 2013
With Halloween coming near again icons like these would be nice: pumpkin, spider, spiderweb, ghost, black cat, coffin, mummy, headstone, bat, candy.