Phishing methods have become extremely popular, which makes it difficult for the average person to verify the degree of danger. By opening an email or website, they are not able to distinguish it from fake ones. This favors extortion on a large scale and is profitable for criminals. Often, fake emails and websites contain real-world logos from well-known companies, which makes them look very credible.

https://isc.sans.edu/diary/Phishing+with+a+self-contained+credentials-stealing+webpage/25580