Detector, detection method, and detection program

A detection method performed by a detector, the detection method comprising:

• an extraction step of extracting, from an advertising request as a request to view an online advertisement, client information on a client as a transmission source of the advertising request and publisher information on a website of a publisher who displays advertising, and calculating a predetermined feature amount using the client information and the publisher information with respect to a plurality of advertising requests including at least a benign advertising request;
• and
• a determiner generation step of generating a determiner that determines whether an advertising request is malignant or not by using the calculated feature amount.

A non-transitory computer-readable recording medium including a detection program that causes a computer to execute:

• an extraction step of extracting, from an advertising request as a request to view an online advertisement, client information on a client as a transmission source of the advertising request and publisher information on a website of a publisher who displays advertising, and calculating a predetermined feature amount using the client information and the publisher information with respect to a plurality of advertising requests including at least a benign advertising request;
• and
• a determiner generation step of generating a determiner that determines whether an advertising request is malignant or not by using the calculated feature amount.