mcp-pdftool-plusPyPI
Advisory published Updated
mcp-pdftool-plus is a confirmed malicious PyPI package (MAL-2026-603) that steals credentials and exfiltrates sensitive data (malicious versions 0.1.3, 0.1.4, 0.1.5). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in mcp-pdftool-plus (PyPI)
What this malware does
When using the library, the hidden code starts a reverse shell
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-01-mcp-pdftool-plus
Reasons (based on the campaign):
-
The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.
-
action-hidden-in-lib-usage
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for mcp-pdftool-plus (3 malicious versions).
If you installed it — respond
mcp-pdftool-plus is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If mcp-pdftool-plus was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks mcp-pdftool-plus-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.