For 5 or 6 months I have been experiencing a strange activity on my android 4.1.2 device. It is samsung galaxy tab 2. The problem is somehow every day a few log files will appear in the root of my SD card and I could not figure out why and what application does it. It is very annoying as I need to clean them. I will attach a screenshot. If anyone came across the same issue, please let me know. We could try to find the solution together. If more information is needed, feel free to ask. Thank you. Vitaly.
Dan Hulme was correct. I did indeed have an application called "Foreca Weather" and it created the logs. It's been several days since I'd uninstalled the app, and the problem haven't showed up again. Previously I had this application for a year and didn't see any such issue till the recent update they had.