Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffe30883ad28837…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 23:02:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 654ed497d103e4cb2d051c023ca1f5c2 SHA-1: c423b61a77aeccc1c9e645dacc64d1c5e830723b SHA-256: 3ffe30883ad288373cf880318fed85c7002b3a42b87c8a1917dcae118a4107ae
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 downloading further content. It embeds multiple URLs, including one pointing to a 'free roblox game hack', suggesting a social engineering attack. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-roblox-game-hack
    • http://i-koinoxrista.gr/images/coin-master-hack-mod-game-download_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://i-koinoxrista.gr/images/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://i-koinoxrista.gr/images/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://i-koinoxrista.gr/images/get-free-robux-now_GM431946152.pdf
    • http://i-koinoxrista.gr/images/get-free-robux-no-verification_GM431946152.pdf
    • http://i-koinoxrista.gr/images/free-spins-for-coin-master-game_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-robux-just-click_GM431946152.pdf
    • http://i-koinoxrista.gr/images/free-free-robux_GM431946152.pdf
    • http://i-koinoxrista.gr/images/coin-master-daily-spin-link-app_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-minecraft-skins-xbox-one_GM479516143.pdf
    • http://i-koinoxrista.gr/images/hacked-roblox-accounts-list_GM431946152.pdf
    • http://i-koinoxrista.gr/images/coin-master-unlimited-spin-hack_GM406889139.pdf
    • http://i-koinoxrista.gr/images/minecraft-free-download-2021_GM479516143.pdf
    • http://i-koinoxrista.gr/images/free-minecraft-pe-server_GM479516143.pdf
    • http://i-koinoxrista.gr/images/flame-gg-free-robux_GM431946152.pdf
    • http://i-koinoxrista.gr/images/how-to-get-free-coins-on-flip-master_GM406889139.pdf
    • http://i-koinoxrista.gr/images/coin-master-hack-software-download_GM406889139.pdf
    • http://i-koinoxrista.gr/images/free-coin-master-spin-generator_GM406889139.pdf
    • http://i-koinoxrista.gr/images/roblox-hack-me_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004827.bin
d1da1147e4ba37d68303e933f5c78f59cd5c3cf8849715a3b64bf9420a9a2602		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4827 33228 bytes
font_01_sfnt_off00009284.bin
abd46f863f925739c6779ba87e0350ce04166d926cbd983fd5dc50e2b294e41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9284 17948 bytes

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