Security Audit

nano-pdf

github.com/openclaw/skills

AI SkillCommit 13146e6a3d46

CRITICAL

Scanned 3 months ago

Critical

Immediate action required

High

Priority fixes suggested

Medium

Best practices review

Low

Acknowledged / Tracked

Trust Assessment

nano-pdf received a trust score of 40/100, placing it in the Untrusted category. This skill has significant security findings that require attention before use in production.

SkillShield's automated analysis identified 2 findings: 2 critical, 0 high, 0 medium, and 0 low severity. Key findings include Obfuscated execution: base64 decode to shell, Remote Code Execution via Obfuscated Command Injection.

The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. All layers scored 70 or above, reflecting consistent security practices.

Last analyzed on February 13, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.

Layer Breakdown

Manifest Analysis

100%

Static Code Analysis

70%

Dependency Graph

100%

LLM Behavioral Safety

70%

Behavioral Risk Signals

Network Access

1 finding

Shell Execution

2 findings

Dynamic Code

1 finding

Security Findings2

Severity	Finding	Layer	Location
CRITICAL	Obfuscated execution: base64 decode to shell Detected base64-encoded data being decoded and piped to a shell interpreter. This is a common obfuscation technique. Decode and inspect the base64 content before execution.	Static	skills/sakaen736jih/nano-pdf-vbdin/SKILL.md:10
CRITICAL	Remote Code Execution via Obfuscated Command Injection The skill provides a MacOS installation command that uses base64 encoding to obfuscate a shell command. This command then downloads and executes an arbitrary script from an untrusted IP address (91.92.242.30) over unencrypted HTTP, piping its content directly to bash. This constitutes a severe remote code execution vulnerability, allowing an attacker to run any code on the user's system, leading to potential system compromise, data exfiltration, or malware installation. Immediately remove the malicious MacOS installation command. All software installations should rely on trusted package managers, official installers, or verified binaries downloaded over HTTPS from reputable sources. Avoid executing arbitrary scripts downloaded from unverified URLs, especially those piped directly to a shell.	LLM	SKILL.md:13

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