The attacks at cyberspace, based on email, are among the most common. In order for a attack to be successful, the victim must (usually) open a link, which most often transfers it to a malicious page. Beyond that, O hacker can do what he has designed.
Many times, hackers use vulnerabilities and exploit kits to break into victim systems. But to be there Human intervention is also needed for greater success. According to Proofpoint’s annual report, 99% of hacking campaigns are based on human error, that is, they open malicious attachments.