Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.
Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.
Severity
Medium
Analysis Summary
Multiple PDF samples are discovered in the wild which exploit a Google Chrome unpatched flaw. The exploited vulnerability allows the sender of the PDF files to track the users and collect some user information when they use Google Chrome as a local PDF viewer.
These samples acted alright in the local PDF viewer but made suspicious outbound traffic when they were opened locally on Google Chrome.
Researchers observed that data was being sent to readnotify[.]com without informing user. The traffic is a HTTP POST packet, according to which following information of the user may be collected by the malicious sender:
This affects Google Chrome (as local PDF viewer), not Adobe Reader and does not allow NTLM stealing, but it leaks your OS information and the path of the file stored on your local disk.
Another PDF sample cpmmunicated with hxxp[:]//zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
Impact
Personal Information Disclosure
Affected Products
Google Chrome
Indicators of Compromise
IP(s) / Hostname(s)
zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
52[.]16[.]21[.]24
91[.]103[.]1[.]84
URLs
hxxp[:]//zuxjk0dftoamimorjl9dfhr44vap3fr7ovgi76w[.]burpcollaborator[.]net
readnotify[.]com
Filename
Malware Hash (MD5/SHA1/SH256)
Remediation