Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf5c8ec1f6b46d7…

MALICIOUS

PDF

46.9 KB Created: 2021-05-14 12:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7eb91c4050db072d392b5cd775c4b6a4 SHA-1: 1c9d3eb21f0d8f9f743e4a620fbaaacba62c1988 SHA-256: cdf5c8ec1f6b46d727af3dcdd4ffdc245d1d41ecbe57fc26a17cb8125f4c26ed
142 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and requests recovery secrets, strongly indicating a social engineering attempt to trick the user into clicking malicious links. The embedded URLs, such as 'https://netcdn.xyz/app/431946152/get-free-robux-no-human-verification-game-hack', likely lead to further malicious content or phishing pages. The document's content and heuristics suggest a lure for free in-game currency or similar scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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 https://netcdn.xyz/app/431946152/get-free-robux-no-human-verification-game-hack
    • https://kojak-group.com/userfiles/files/coin-master-spins-hack_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • https://kojak-group.com/userfiles/files/free-robux-script_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/free-robux-websites-that-work_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/regal-world-coin-master_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/free-robux-generator-2021_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/rbx-website_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/free-robux-sites-2021_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://kojak-group.com/userfiles/files/free-minecraft-premium-account_GM479516143.pdf
    • https://kojak-group.com/userfiles/files/coin-master-hack-2021-link_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-2021-app_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/roblox-lovenet_GM431946152.pdf
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-twitter_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/coin-master-hack-spins_GM406889139.pdf
    • https://kojak-group.com/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a56.bin
e3669d59386882c75f0c463aeb637aa7749647f0f4f9c0fc335726dbe99d58a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A56 26144 bytes
font_01_sfnt_off00008777.bin
d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8777 3512 bytes
font_02_sfnt_off0000930b.bin
77094cb8e4b41d81131149df95963a95cd1356d500cc75fcdf894a2f9afc6be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x930B 18860 bytes

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