Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c629244a5576b7…

MALICIOUS

PDF

35.7 KB Created: 2021-06-19 22:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 77b0f1ddcfe1a345bed1a8a44829985f SHA-1: 09b1652467a52d331a9a1e8a522251b31a426e49 SHA-256: d7c629244a5576b7db960a22aeea85c05d8326b47f3f4953798a3f445ade07cf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents itself as a lure for game cheats and in-game currency, such as Roblox and Minecraft. It employs a fake CAPTCHA or human verification prompt to trick users into downloading a secondary payload from the embedded URL. The ML classifier strongly indicated maliciousness, supporting the observed social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.co/app/431946152/roblox-admin-commands-hack-with-cheat-engine-6.2-game-hack
    • https://financia-business-school.com/static/upload/files/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • https://financia-business-school.com/static/upload/files/coin-master-free-gold-cards_GM406889139.pdf
    • https://financia-business-school.com/static/upload/files/free-robux-wheel_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • https://financia-business-school.com/static/upload/files/free-robux-codes-club_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/can-you-hack-peoples-roblox-credit_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • https://financia-business-school.com/static/upload/files/coin-master-online-hack-link_GM406889139.pdf
    • https://financia-business-school.com/static/upload/files/roblox-free-robux-gift-card-codes_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/free-roblox-hack_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • https://financia-business-school.com/static/upload/files/free-account-roblox-2021_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/op-rewards-robux_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/www-coin-master-hack_GM406889139.pdf
    • https://financia-business-school.com/static/upload/files/how-to-hack-roblox-phantom-forces_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/roblox-hack-generator_GM431946152.pdf
    • https://financia-business-school.com/static/upload/files/robux-free-no-robot_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003155.bin
8996b388ae8beb733e3112892dfc341d22f954c7f33ed1df8e6c22ba9b1b1e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3155 22476 bytes
font_01_sfnt_off0000636d.bin
25189e3999fca01740d5a519a09ab36e447f0b03b44a0435b484447e837c90fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 20036 bytes

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