Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37786a211f54819…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 23:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 662a0ef35883da7be5ba2eff7fccab0d SHA-1: f51f011b33fd40b06bb221b2436f3064f3b35a25 SHA-256: f37786a211f54819e72e5e44a04152f3032bb93e46587b5a9aac0c23042731e4
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 the user into interacting with a malicious link. The primary external URI points to a resource related to 'free Robux game hack', suggesting a scam or phishing attempt. The document body and embedded URLs reinforce this theme, indicating the likely goal is to drive users to a site that may host further malware or phishing content.

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.online/app/431946152/how-to-win-free-robux-game-hack
    • http://pustaka.fk.unand.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/robux-hack_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://pustaka.fk.unand.ac.id/repository/roblox-speed-hack_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-tiktok-followers_GM835599320.pdf
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://pustaka.fk.unand.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-spin-today_GM406889139.pdf
    • http://pustaka.fk.unand.ac.id/repository/free-minecraft-pe-server_GM479516143.pdf
    • http://pustaka.fk.unand.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://pustaka.fk.unand.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • http://pustaka.fk.unand.ac.id/repository/roblox-hack-game_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/get-free-robux-2021_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/free-robux-offers_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdf
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://pustaka.fk.unand.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdf
    • http://pustaka.fk.unand.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052af.bin
bcf240754b4cb6822caa3acf6cc186112d9fd43414d60da713acf50c0e8541d4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AF 24288 bytes
font_01_sfnt_off000089ea.bin
e7fadbffdbea7672d80b62dbce00c4cb5a3018b55a4b8226d615899545ab846e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EA 18496 bytes

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