Abstract: Systems and methods for authenticating objects associated with online activities are provided. For a target object involved in online activities, an authentication system accesses data associated with the target object and generates a featurized dataframe for the target object by processing the data associated with the target object. The authentication system further applies a machine learning model to the featurized dataframe to determine an authenticity indicator for the target object and assigns the target object to an authentication stream according to the authenticity indicator determined. Based on the results returned from the assigned authentication stream, the online activities involving the target object may be blocked or permitted.