Jinx on Vacation Live Wallpaper

AI Security Review

Evidence context: threat category none; evidence quality moderate.

The extension "Jinx on Vacation Live Wallpaper" shows no evidence of malicious behavior. All 21 high-severity findings in the malware-signature category are actually code-smell rules, as confirmed by findings_summary which shows "code-smell":21 and "malware-signature":"0". The YARA rules triggering these findings—postinstall_network_communication, postinstall_system_command, postinstall_file_manipulation, postinstall_file_download, NoUseWeakRandom, and LocalStorageShouldNotBeUsed—are documented false positives that match basic JavaScript patterns, not malware.

The file paths for all malware-signature findings show unknown_file, indicating the analysis could not locate specific source code matches. This is typical for code-smell rules that fire on bundled or minified code. The only concrete findings are two network calls: js/popup.js:35 and js/script.js:17 both trigger NET-FETCH findings for generic fetch() usage. These are standard for any extension making API calls and contain no suspicious domains.

The extension's functionality aligns with its description: a live wallpaper tool. The developer email [email protected] provides no company attribution, but this alone does not indicate malice. The low user count (43 users) is consistent with a niche wallpaper extension rather than a malicious distribution campaign. No obfuscation findings, no suspicious IoCs, and no browser hijacking or credential theft indicators are present.

Counterargument: A skeptic might point to the 21 high-severity findings and anonymous developer as concerning. However, the findings_summary explicitly categorizes these as code-smell (21 findings) rather than malware signatures (0 findings). The severity ratings are artifacts of the scoring system, not evidence of malicious intent. Code-smell rules like postinstall_* patterns fire on virtually any non-trivial JavaScript bundle and are classified as noise in the threat model. Without specific suspicious domains, actual malware signatures, or obfuscation, these findings cannot support a malicious verdict.

Key Reasons

• All malware-signature findings are code-smell rules per findings_summary showing 21 code-smell vs 0 actual malware signatures
• No suspicious domains or IoCs present in network findings
• Network calls in js/popup.js and js/script.js are generic fetch() usage without malicious destinations
• Extension functionality (live wallpaper) matches stated purpose with no behavioral anomalies
• No obfuscation findings or browser hijacking indicators

False Positive Considerations

• postinstall_* YARA rules matching basic Node.js patterns
• Code-smell rules misclassified as malware-signatures
• Unknown_file paths indicating generic pattern matches rather than specific code

Reviewed 2026-04-30; recommended action: suppress false positive; model confidence 85%.