Simple way to bloat up sides of cube

[Ofsance]

He guys,

I was wondering if there is a simple solution on how to create a cube like the attached one.

Using the "Pucker & Bloat" does basically exactly what i want, just that the corners go in to shape it like a flower (Which i do not want". 

[Ton Frederiks]

Rectangle with Rounded corners and Object >  Envelope Distort > Make with Warp >  Inflate?

[Kurt Gold]

- Draw a circle.
- Select menu > Object > Direction Handles.
- Object menu > Transform > Scale: Do a Uniform Scale ( e.g. 115 %).

[Ofsance]

Sadly non of them gives anything similar to thus one