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Phishing Webpage Detection using Machine Learning Methods
Polóni, Peter ; Poliakov, Daniel (oponent) ; Hranický, Radek (vedoucí práce)
Phishing web pages are a very dangerous threat, which means that successful and reliable detection of these pages is essential. I detect these threats by utilizing a machine learning based approach. This approach is effective and can detect even threats it has never encountered. As credible sources of URLs, I used sources like OpenPhish and PhishTank. I gathered the HTML and JavaScript code of web pages from the trusted URLs by utilizing a data-gathering program that I created. Using the feature vector composed of 82 numerical features, I created four classifiers. Then, I tuned and experimentally tested the performance of these classifiers. The best-performing model is the XGBoost classifier, which achieved a balanced accuracy score of 97.03% and a false positive rate of 2.22% while making predictions on previously unseen data. Results show that this detection approach can identify phishing web pages even in a non-training environment, which I verified by implementing a phishing-detecting web extension for the Chrome browser. Implementing this extension is beyond the scope of the assignment of this thesis.

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