Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dc1acbe3a7633f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 07:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95c9e58c5989cbdbd5eb4466d2256657 SHA-1: 6a785a5db674282bafa468ee3ec45e404ae2e17c SHA-256: c7dc1acbe3a7633f4f69192704127f693d97df04c64c0f112cb6d981af2d4c19
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into clicking a link. This lure is associated with downloading further malicious content. The presence of multiple external URIs, including one pointing to 'robux-for-free-pc-computer-game-hack', strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/robux-for-free-pc-computer-game-hack
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-hack-any-roblox-account-with-their-roblosecurity_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/download-roblox-hack_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-modded-minecraft-server_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/royale-high-roblox-outfit-hacks_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/create-minecraft-server-free_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/minecraft-build-hacks_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-generator_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-robux-generator_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/i-think-someone-hacked-into-my-roblox-account_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/apps-to-get-free-robux_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robuxy-com-free-robux_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/is-minecraft-free_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051be.bin
64b81548a775592797ea9c886b6b25aded9cb50f71562854de07dae3ca54696e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BE 25152 bytes
font_01_sfnt_off00008bfe.bin
39a3b811ae8d1fd61c22b147fc70afaf46a8fefc0e9dabd7ceb6117e310638a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFE 18708 bytes

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