Malicious PDF — malware analysis report

Static analysis result for SHA-256 59998fe307785884…

MALICIOUS

PDF

48.4 KB Created: 2021-06-09 12:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc1c9b450eb3dbe6774ef844ad241b9f SHA-1: 62876ace989de901216eff798e59cd077616aefe SHA-256: 59998fe307785884fd47af73c463b4302f5a250fc8907fc08a4ff1b350ec0b07
82 Risk Score

Malware Insights

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

The document's content and heuristics indicate a lure for game-related cheats or hacks, presenting a fake CAPTCHA to deceive the user. It contains multiple embedded URLs pointing to potentially malicious files, including one at `https://netcdn.tw/app/431946152/roblox-magnet-simolator-hack-game-hack`. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-magnet-simolator-hack-game-hack
    • http://perpustakaan.man2kotaserang.sch.id/repository/scary-larry-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/www-roblox-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/is-windows-10-minecraft-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-coin-master-apk-31_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/deadzone-roblox-hack_GM431946152.pdf
    • https://perpustakaan.man2kotaserang.sch.id/repository/minecraft-account-hacked_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/robux-hacks-2021_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/what-is-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-minecraft-realm-codes_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-mod-game-download_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-instagram-free-spins_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-robux-clothes_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-studio-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005281.bin
c4c12a61926c886c28d4b7c85f41a41bd5696b4c5852ba700bcfc221951b7836		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5281 25436 bytes
font_01_sfnt_off00008e0e.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 2840 bytes
font_02_sfnt_off000097bf.bin
ceb7adaff2e9686b51be11e43e0da3c05fe759bc7eb142458ddc1c1f5f8a791e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BF 19148 bytes

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