Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e31f3821623ccaa…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 07:10:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8e8bc7b6c9993760b42301f926ff27bd SHA-1: f11ec63935fa3e267bd90325c52de734867d4546 SHA-256: 5e31f3821623ccaa40627d41574b0a80188f55ae432d092ce4a5d7ca749289ce
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 the user into clicking a malicious link. The embedded URL, http://netcdn.tw/app/431946152/give-free-robux-game-hack, likely leads to a payload download or further phishing content. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering tactics.

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 http://netcdn.tw/app/431946152/give-free-robux-game-hack
    • https://katalog.smkn1glagah.sch.id//repository/where-to-get-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-co_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/2-player-cheat-pizza-tycoon-in-roblox_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/earn-robux-websites_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/hackear-cuenta-de-roblox-2021_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/rbx-land-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-mod-apk-unlimited-robux-2021-download-free_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/my-hero-academia-roblox-cheat-engine_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-does-roblox-get-hacked_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-robux-2021-no-survey_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-connection-lost-hack_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/deadly-sins-retribution-release-script-roblox-hack_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-make-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/pokemon-brick-bronze-roblox-hacks_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-1-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-admin-hack-v3rmillion_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-games-com-free_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000327b.bin
69995491aa32556a9dfe5a37958795f8338ff351cd8b11c06542e3cf3de85d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22156 bytes
font_01_sfnt_off000063cf.bin
099c16aecc59e05ee2a67675ac57707afb633d1d3f2ee222ad3cc0024ed5c63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 18952 bytes

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