Malicious PDF — malware analysis report

Static analysis result for SHA-256 7709bbdf00f32e5d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 05:18:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 04637ee0f4ac22a3efc33a2d08e02fb9 SHA-1: 5e550cb446bd057e978455530cf51b44b08479ee SHA-256: 7709bbdf00f32e5ddcc3096168f0809a43b9aca33a5a5a50251e44bd0b9a5a98
122 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 clicking a link. This link, 'http://netcdn.tw/app/431946152/is-roblox-studio-free-game-hack', redirects to a website offering game hacks. The document's content and heuristics strongly suggest a social engineering attack aimed at users seeking cheats for online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/is-roblox-studio-free-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/todos-los-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-cheat-supercheats_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-roblox-account-online_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/2021-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F23 22112 bytes
SHA-256: dc9ab4b6984e01c8e085e1c204601affadb1443109c47716bb6d33d6335b4c66
font_01_sfnt_off0000606d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 19188 bytes
SHA-256: 5b1de23626d81aaf99a279195b00efdf905ea81811442041bbbefcdac3d0aa36

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