Supposed calls from parcel delivery companies to install amalicious software.
In this variant, the emails are often accompanied by a telephone call from a company called Swiss Express Service (or similar), which wants to have the shipping documents signed. During the conversation, the caller says that the documents will be sent via email. The attackers attempt to install malware on a computer in this way. The link in the PDF document contains hidden malware. The malware delivered can vary. In most cases it is an e-banking Trojan.