Around 800 boys and 200 girls between ages 15 and 20 and four younger people from Denmark have reportedly circulated the material in 2015 until the autumn of 2017.
A new research conducted by researchers at the Ruhr University Bochum, Germany has found a potential possibility of hackers spying on group chats in WhatsApp
The malware, dubbed as "AdultSwine", displayed pornographic images that looked like advertisements designed to prompt users to download fake security software.