Looks like it's being used to receive hacked bitcoins not exclusive to Electrum, the chance of being fake Electrum the culprit slim.
It was reported here: https://bitcoinwhoswho.com/address/13k4rgQ6b9LdBt6pvgLR5MSV6wAhujFpgq, expand the "scam alert" portion.

What are the other installed applications you have in your phone?
And please answer the question in post#2, where did you stored your 12-word seed phrase? <-- must be the issue.