Facebook hacked update

So my question is can a hacker or how likely would they message only one friend and do nothing else???

The messages were ridiculous...childish almost. Calling me dumb . When I rang the friend she said it wasnt her and she was hacked...got her to check did the hacker msg anymore people and no just me . The msgs also had something in them that is a running joke between me and the friend . I'm thinking it was her πŸ™€ by the way she is in her 30s so I'm baffled as to why she would send them and blame a hacker πŸ€”