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A phishing attack is one of the most common and most lethal social engineering attacks. In phishing, attackers design emails to gain sensitive information from the victims or launch malware in their systems. Spear phishing is specifically designed against the target organization using the information of their employees. These attacks are highly effective as the attacker finds the openly available information of the organization through social networking websites and designs the attack accordingly. Spear-phishing emails not only appear to be relevant and authentic, but also have an impression of urgency, making victims respond immediately.