Did you ever download (and activate in Winterboard) the theme "exxOS"? Cause it comes with a set of springjumps - which is what your icons look like they are.
If you don't have the Springjumps tweak installed, these wont work. But, you can delete them with iFile (or by SSHing in ... or using iFunbox/iExplorer). If those are Springjumps icons from the exxOS theme, you'll find them at this location:
var/stash/Applications
All you'll have to do is delete the folders that start with "_shortcut_". Once you delete those folders, respring and then, those icons should be gone.
Marilyn