MALICIOUS
102
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The document presents a fake CAPTCHA and a lure for 'free Robux' to trick users into clicking a malicious link. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests a download or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a social engineering attack designed to lead the user to a malicious website.
Machine Learning
- Nyx PDF Classifier malicious score 0.9980
Heuristics 5
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Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHADocument displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument 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.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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External URI info PDF_URIPDF contains an external URL action
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Embedded URL info EMBEDDED_URLOne 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 https://netcdn.xyz/app/431946152/how-do-you-get-free-robux-without-paying-game-hack
- http://citycare.pt/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
- http://citycare.pt/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
- http://citycare.pt/images/free-robux-not-a-scam_GM431946152.pdf
- http://citycare.pt/images/free-premium-roblox_GM431946152.pdf
- http://citycare.pt/images/free-links-coin-master_GM406889139.pdf
- http://citycare.pt/images/roblox-comroblox_GM431946152.pdf
- http://citycare.pt/images/free-robux-no-verification-needed_GM431946152.pdf
- http://citycare.pt/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
- http://citycare.pt/images/free-roblox-accounts-2021_GM431946152.pdf
- http://citycare.pt/images/robux-hack-2021_GM431946152.pdf
- http://citycare.pt/images/blox-supply-free-robux_GM431946152.pdf
- http://citycare.pt/images/my-minecraft-account-was-hacked_GM479516143.pdf
- http://citycare.pt/images/hackear-coin-master-sin-root_GM406889139.pdf
- http://citycare.pt/images/minecraft-reach-hack_GM479516143.pdf
- http://citycare.pt/images/free-roblox-printables_GM431946152.pdf
- http://citycare.pt/images/games-that-give-free-robux_GM431946152.pdf
- http://citycare.pt/images/mobihack-roblox-hack_GM431946152.pdf
- http://citycare.pt/images/roblox-shirt-template-free_GM431946152.pdf
- http://citycare.pt/images/coin-master-hack-spins-free_GM406889139.pdf
- http://citycare.pt/images/best-site-for-free-coin-master-free-spins_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_003_off00004baf.binbce403eced6e420c7099579c96f813227c71816cfaf0e7a3adfc9f1076348262 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x4BAF | 28552 bytes |
font_01_sfnt_off00008bfc.bin5d1001e3ac77277796354ae1628373f4f4a3ba3fa344903a86c4555bafe1b783 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x8BFC | 19948 bytes |
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