Phishing Analysis: JCB

Visual Capture

Detection Info

https://docs.google.com/document/d/1dtAbpjRNnd6dpERGsE5m2hzMgrHaDn2eRU-ylXcaWMg/edit?tab=t.0

Detected Brand

JCB

Country

Japan (implied by the .co.jp TLD)

Confidence

100%

HTTP Status

200

Report ID

a88339d4-558…

Analyzed

2026-01-30 04:33

Content Hashes (HTML Similarity)

Used to detect similar phishing pages based on HTML content

Algorithm	Hash Value
CONTENT TLSH	T12CE3BD32C0423033A1AB56D5F860677926D3C22DDF0B08452BBCDB963FEBD967592A1D
CONTENT ssdeep	3072:egA76cUOugiUhoSWeBYVplVX/cn3x/hSCVuDdi5NvHao7LVq3u/19/JSA4LGZPI8:JA76cUOugiUhoSWeBYVplVX/cn3x/hSg

Visual Hashes (Screenshot Similarity)

Used to detect visually similar phishing pages based on screenshots

Algorithm	Hash Value
VISUAL pHash	911155555d7d7d28
VISUAL aHash	003c3cbc3c3c3c3c
VISUAL dHash	b0d8f06060606060
VISUAL wHash	003d7cfc3c3c3c3c
VISUAL colorHash	07200008180
VISUAL cropResistant	b0d8f06060606060

Code Analysis

Risk Score 97/100

Threat Level ALTO

⚠️ Phishing Confirmed

🎣 Credential Harvester 🎣 OTP Stealer 🎣 Card Stealer 🎣 Banking 🎣 Personal Info

🔬 Threat Analysis Report

• Threat: Impersonation/Phishing
• Target: JCB (potential target of the phishing attempt)
• Method: Domain spoofing, social engineering
• Exfil: Potentially the target domain will collect credentials.
• Indicators: Domain mismatch, suspicious content, text in Japanese language.
• Risk: High

🔒 Obfuscation Detected

atob
eval
fromCharCode
unescape
document.write
hex_escape
unicode_escape
base64_strings

📡 API Calls Detected

POST
a
i
h5
h6
p
h4
u
GoogleDocs
kbd
h1
blockquote

📊 Risk Score Breakdown

Total Risk Score

90/100

Contributing Factors

Domain Mismatch

The domain my.jcb.co.jp does not align with the perceived Google Docs branding.

Suspicious Content

The prompt to access another domain is unusual and suspicious within Google Docs context. The content is written in Japanese and the file is named 'MyJcb' which is a clue.

Obfuscation

Javascript Obfuscation detected in the source code.

🔬 Comprehensive Threat Analysis

Threat Type

Banking Credential Harvester

Target

JCB users (Japan (implied by the .co.jp TLD))

Attack Method

Brand impersonation + credential harvesting forms + obfuscated JavaScript

Exfiltration Channel

Form submission (backend endpoint not detected - likely JavaScript-based)

Risk Assessment

CRITICAL - Automated credential harvesting with Form submission (backend endpoint not detected - likely JavaScript-based)

⚠️ Indicators of Compromise

Kit types: Credential Harvester, OTP Stealer, Card Stealer, Banking, Personal Info
10557 obfuscation techniques

🏢 Brand Impersonation Analysis

Impersonated Brand

Google Docs and JCB (indirectly)

Official Website

docs.google.com and jcb.co.jp

Fake Service

Document access (Google Docs) and JCB (indirectly)

⚔️ Attack Methodology

Primary Method: Credential Harvesting

The attackers are likely attempting to steal the user's credentials by leading them to a fake login page on the my.jcb.co.jp domain. They probably use a phishing technique.