Strange behavior of Syncfusion Homepage

Hi all,
some days ago I received an e-mail from Syncfusion

showing very interesting free books.
However when I came on their site my CPU usage went high and the virus scanner told me that coinhive Krypto-mining was installed on my PC.
Is this evtl. because I have a virus on my PC or are they really doing Krypto-mining on their customers Pcs?

Same result here. Except that Malwarebytes blocked it.Capture

If this were intentionally, it would be really disappointing :rage:

Same here and Avast blocks it.

Seems that they stopped it now.