Opening unknown files on your devices is very dangerous! You need to be very accurate when somebody is sending you anonymous files via WhatsApp and others applications.
Now new PDF malware files were detected. They are sent anonymously messengers like WhatsApp, email. This malware can cause heavy damage on electronic devices and smartphones.
PDF malware is a significant portion of cyberattacks launched over the past few years, and urged residents and establishments to have backup databases independent of the internet.
Take care about your safety and security on-line!