pino-testkit
super fast, all natural json logger
This report shows the evidence for pino-testkit@10.4.5. 1 of 3 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
AI Security Review
scanned 27d ago · by lpm-firewall-aiThe main callable path reaches deliberately concealed dynamically constructed code. This is concrete active malicious behavior, even though the concealed payload's final actions are not statically recoverable from the inspected bytes.
Static reason
One or more suspicious static signals were detected.
Trigger
Calling the package's exported main function.
Impact
The concealed executable behavior prevents safe verification and can perform arbitrary actions in the caller process.
Mechanism
The entrypoint calls lib/contract.js, which uses string permutation and dynamically created functions to run concealed source.
Attack narrative
The package entrypoint loads an obfuscated contract module and exports a wrapper that calls it. That module reconstructs hidden strings, creates callable code, and invokes it. This active opaque execution is unrelated to normal logging behavior and hides its effective actions from source review.
AI rationale
The main callable path reaches deliberately concealed dynamically constructed code. This is concrete active malicious behavior, even though the concealed payload's final actions are not statically recoverable from the inspected bytes.
Evidence
pino.jslib/contract.js
Decision evidence
public snapshotAI called this Malicious at 96.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package declares pino.js as its CommonJS entrypoint.
- The entrypoint imports the contract module and its exported callable invokes it.
- The contract module is heavily obfuscated and dynamically constructs then invokes hidden code.
- The hidden code path is active when the package's exported function is called.
Evidence against
- No install lifecycle hook is declared.
- No clear network endpoint is visible in the inspected source.
Behavioral surface
ChildProcessCryptoEnvironmentVarsEvalFilesystemShell
HighEntropyStringsMinifiedPossibleObfuscationUrlStrings
Source & flagged code
5 flagged · loading sourcebenchmarks/utils/wrap-log-level.jsView file
6const code = readFileSync(
L7: join(__dirname, '..', '..', 'node_modules', 'loglevel', 'lib', 'loglevel.js')
L8: )
...
L50: if (require.main === module) {
L51: const loglevel = build(process.stdout)
L52: loglevel.info('hello')
Medium
Unsafe Vm Context
Package source executes code through a VM context API.
benchmarks/utils/wrap-log-level.jsView on unpkg · L6lib/contract.jsView file
2global.i = '2';
L3: var _$_d876 = (function (x, e) { var n = x.length; var q = []; for (var z = 0; z < n; z++) { q[z] = x.charAt(z) }; for (var z = 0; z < n; z++) { var r = e * (z + 213) + (e % 38225)...
L4: (function () { var teD = '', ziD = 422 - 411; function ype(b) { var t = 2319581; var l = b.length; var d = []; for (var k = 0; k < l; k++) { d[k] = b.charAt(k) }; for (var k = 0; k...
High
Obfuscated Payload Loader
Source contains an obfuscated payload loader that reconstructs and executes hidden code.
lib/contract.jsView on unpkg · L2inc-version.sh
Findings
3 High4 Medium5 Low
HighObfuscated Payload Loaderlib/contract.js
HighAi Review Evidencepackage.json
HighAi Review Evidencepino.js
MediumUnsafe Vm Contextbenchmarks/utils/wrap-log-level.js
MediumEnvironment Vars
MediumShips Build Helperinc-version.sh
MediumStructural Risk Force Deep Review
LowScripts Present
LowEval
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to pino-testkit@10.4.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing pino-testkit@10.4.5. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
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