Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3375098dbd455e8…

MALICIOUS

PDF

41.1 KB Created: 2021-05-14 21:41:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 12fa1bd90a98ee5cd4ff249b12e254f6 SHA-1: 7727864727d48068e58c139684ee21d7027a9443 SHA-256: c3375098dbd455e80fe09df8f54917d03857cfa15bddcbf59705613d8ed47008
82 Risk Score

Malware Insights

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

The document presents itself as a 'Coin Master Hack' and displays a fake CAPTCHA to trick the user into clicking a link. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-hack-version-2021-game-hack, is likely the initial download point for a secondary payload. Numerous other suspicious URLs were also extracted, suggesting a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/406889139/coin-master-hack-version-2021-game-hack
    • http://legs11.co.za/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://legs11.co.za/images/coin-master-free-rewards-link_GM406889139.pdf
    • http://legs11.co.za/images/free-spin-links-coin-master-2021_GM406889139.pdf
    • http://legs11.co.za/images/free-robux-2021-no-verification_GM431946152.pdf
    • http://legs11.co.za/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://legs11.co.za/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://legs11.co.za/images/hacker-minecraft-song_GM479516143.pdf
    • http://legs11.co.za/images/doctor-louie-roblox_GM431946152.pdf
    • http://legs11.co.za/images/roblox-hack-ga_GM431946152.pdf
    • http://legs11.co.za/images/cheating-hacks-for-coin-master_GM406889139.pdf
    • http://legs11.co.za/images/how-do-you-get-robux_GM431946152.pdf
    • http://legs11.co.za/images/play-coin-master-for-free_GM406889139.pdf
    • http://legs11.co.za/images/rbx-free-robux_GM431946152.pdf
    • http://legs11.co.za/images/coin-master-hack-tool-no-survey_GM406889139.pdf
    • http://legs11.co.za/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://legs11.co.za/images/free-money-and-spins-coin-master_GM406889139.pdf
    • http://legs11.co.za/images/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://legs11.co.za/images/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://legs11.co.za/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://legs11.co.za/images/free-robux-no-gift-card_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000459f.bin
6e81155b9ee4cfa82f978640f146e795326b2133f1bceabdadc7b5600d06b478		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x459F 24604 bytes
font_01_sfnt_off00007e2b.bin
85f6cbf22caabfd1980f39a563a7f3700d8edada2923e9ca7ca64ea978e7e6b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2B 18252 bytes

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