This email with the subject "Account under investigation" was received in one of Scamdex's honeypot email accounts on Sun, 20 Sep 2015 12:24:36 -0700 and has been classified as a Generic Scam.
The sender was PayPal Security Team <email@example.com>, although it may have been spoofed.
Dear Valued Customer, We have limited your account due to an intrusion by unauthorized users (geolocation analysis shows that it wasn't you). We may limit your account as a security measure to protect you and your account. We will review the information you wish to provide (Check: attachment) and try to resolve the issue as soon as possible. Please open the attachment (form page) that we have provided in this email. Your account will be restored back to its normal state after you have provided the legitimate information in the form. Thank you for your attention to this matter, and we hope that this issue will be resolved as soon as possible. Sincerely, PayPal Account Review Department