NetHunter has a feature that allows us to use our device and OTG cable as a keyboard, and hence, type any commands on any connected PC. This allows us to perform HID attacks.
"HID (human interface device) attack vector is a remarkable combination of customized hardware and restriction bypass via keyboard emulation. So, when we insert the device, it will be detected as a keyboard, and using the microprocessor and onboard flash memory storage, you can send a very fast set of keystrokes to the target's machine and completely compromise it."
–https://www.safaribooksonline.com/library/view/metasploit/9781593272883
–https://www.safaribooksonline.com/library/view/metasploit/9781593272883