""ET WEB_CLIENT Likely Malicious PDF Containing StrReverse""

SID: 2011246

Revision: 10

Class Type: bad-unknown

Metadata: affected_product Web_Browsers, affected_product Web_Browser_Plugins, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag Web_Client_Attacks, updated_at 2012_03_14

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

• Value: "%PDF-"

• Value: "StrReverse|28|"

Within: 5

PCRE:

Special Options:

• file_data

• nocase

source