Some pages are automatically followed and liked by account even I didn't login into any 3rd party app but still I done everything change password and many more but it doesn't work. I reported this problem to Facebook 3 or 4 times but they didn't solve my problem. The pages were awkward and in foreign language and their stories are disgusting I muted everyone but almost more than 4000 pages are automatically liked by my account. I think the algorithm of Facebook is supporting this.