It's some sort of log file. SDK is "software design kit". Have you enabled USB debugging, tried using ADB over USB, connected it to a computer at all? It may have been generated by any app (the SDK is used to develop apps), but "ADB" is also part of the Android SDK, which is why I am asking.
I would like to ask where on the device this file is, i.e. the full file path ("file browser" is just an app, but it should be able to tell you what folder the file is in).