Edit in JSFiddle

<div class="box7">
       <h1>Sample Box</h1>   
       <img src="http://www.wpthemegenerator.com/wp-content/uploads/2012/06/Image.jpg">
        <p>
         Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam luctus consectetur dolor a porttitor. Curabitur id sem sed ante fringilla pulvinar et id lectus. Nullam justo ipsum, hendrerit ut commodo nec, pellentesque nec erat. Pellentesque pharetra.
       </p>
    
       <br />
       <a href="http://www.designshock.com/"> DesignShock.com </a>
</div>

body {
    font-size: 11px;
    font-family: 'Open Sans', sans-serif;
    color: #4A4A4A ;
    text-align: center; 
}

.box7{
    margin: 20px auto;
    width: 320px;
    min-height: 310px;
    padding: 10px;
    position:relative;
    background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
    border-top: 1px solid #ccc;
    border-right: 1px solid #ccc;
    border-left: 1px solid #ccc;
    -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2) ;
}

.box7:before{
    content: '';
    position:absolute;
    width: 130px;
    height: 30px;
    border-left: 1px dashed rgba(0, 0, 0, 0.1);
    border-right: 1px dashed rgba(0, 0, 0, 0.1);
    background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
    -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
    -webkit-transform:translate(-50px,10px)
                        skew(10deg,10deg)
                        rotate(-50deg)
}
.box7:after{
    content: '';
    position:absolute;
    right:0;
    bottom:0;
    width: 130px;
    height: 30px;
    background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
    border-left: 1px dashed rgba(0, 0, 0, 0.1);
    border-right: 1px dashed rgba(0, 0, 0, 0.1);
    -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
    -webkit-transform: translate(50px,-20px)
                        skew(10deg,10deg)
                        rotate(-50deg)
}

.box7 img {
    width: 100%;
    margin-top: 15px;
}

p{ 
    margin-top: 15px;
    text-align: justify;
}

h1{
    font-size: 20px;
    font-weight: bold;
    margin-top: 5px; 
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
}

a{
    text-decoration: none;
    color: #4A4A4A !important;
}

a:hover{
    text-decoration: underline;
    color: #6B6B6B !important ;
}