Malicious PDF — malware analysis report

Static analysis result for SHA-256 864a0671b4d6a9b8…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 20:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 221581dc98b8e427955ea7a61d978891 SHA-1: 645967f249352fa375e245d67517cacbf19f57c0 SHA-256: 864a0671b4d6a9b85b023d40cd8792791b29bb9ce5aca6d29ba84a381054a3b4
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/coin-master-free-cards-and-spin-link-game-hack', likely lead to further malicious content or downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-free-cards-and-spin-link-game-hack
    • http://rainbowbuddha.academy/images/free-robux-net_GM431946152.pdf
    • http://rainbowbuddha.academy/images/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://rainbowbuddha.academy/images/como-hackear-coin-master_GM406889139.pdf
    • http://rainbowbuddha.academy/images/static-moonactive-net-rewards_GM406889139.pdf
    • http://rainbowbuddha.academy/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • http://rainbowbuddha.academy/images/minecraft-free-no-download_GM479516143.pdf
    • http://rainbowbuddha.academy/images/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • http://rainbowbuddha.academy/images/free-robux-accounts_GM431946152.pdf
    • http://rainbowbuddha.academy/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://rainbowbuddha.academy/images/free-spins-and-coins-coin-master-links_GM406889139.pdf
    • http://rainbowbuddha.academy/images/coin-master-real-free-spins_GM406889139.pdf
    • http://rainbowbuddha.academy/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://rainbowbuddha.academy/images/free-coin-coin-master_GM406889139.pdf
    • http://rainbowbuddha.academy/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • http://rainbowbuddha.academy/images/free-robux-on-ipad_GM431946152.pdf
    • http://rainbowbuddha.academy/images/minecraft-hacks-list_GM479516143.pdf
    • http://rainbowbuddha.academy/images/coin-master-free-cards-2021_GM406889139.pdf
    • http://rainbowbuddha.academy/images/coin-master-hack-download-android_GM406889139.pdf
    • http://rainbowbuddha.academy/images/is-windows-10-minecraft-free_GM479516143.pdf
    • http://rainbowbuddha.academy/images/hack-coin-master-no-survey_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf5.bin
df42b7aa4220a3c2c7b701cce32c8fc6a6526caccab642c8cd8f8e61b3b62bc0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF5 25372 bytes
font_01_sfnt_off000085a0.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 2880 bytes
font_02_sfnt_off00008f8b.bin
e7a46ecd3c3d6b5b9fab8b48fe890140ab6e75c9a4df77531e3aad29f6ea7524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8B 18228 bytes

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