You might not think your site is in eyes of hackers, do not amaze on that because it is common. Large number of hackers is waiting to exploit the entire site which is available on server.
On regular basis, cyber criminals are waiting to compromise thousands of websites. We often do not recognize because hacks are hidden from users and it will harmful for site owner as well as page visitor.
One common tactics they use to hack the site is, redirecting your site link to any fake website. By this way they take advantage from your customer. If you diagnose that your sites has been hacked by hackers then fix your site problem as soon as possible.