Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdcdf0216753e49…

MALICIOUS

PDF

20.5 KB Created: 2021-07-19 11:45:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 653dcc77d4e433e2d1d4dfbf92ced9ca SHA-1: 155d6d3fd00da24c74a43ed31d5f51294fa85ec2 SHA-256: 8cdcdf0216753e4943b8519972f9fa4a9b6226765dd759135b4a22eed9931f7c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that promise free game currency or hacks, such as Robux. The heuristic firings indicate this is a lure for game hacks and potentially callback phishing. The embedded URLs likely lead to further malicious content or scams designed to trick users into providing personal information or downloading additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/free-ways-to-get-robux-game-hack PDF link annotation
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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