Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4744f2795f704e6…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 10:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4bc502a670a2b294f34625b6b33d588f SHA-1: 72b6f97bbdc34476b2e5df528985a3aad93d4472 SHA-256: d4744f2795f704e6a7a4130d93c6e48b1c2fe36590fd2ff822871cc18e0edf46
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a download button lure, designed to trick users into clicking a link for game hacks. The primary external URI points to a site offering 'free Robux', which is a common lure for malicious content. The document body and numerous extracted URLs reinforce this theme, suggesting the PDF acts as a phishing document to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-to-get-free-robux-no-verification-2021-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000512f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512F 26996 bytes
SHA-256: 704a7a273329e74746baa444c7eff289dec32c3fedbce5c7747b01927d16a6b2
font_01_sfnt_off00008cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off0000968a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968A 19164 bytes
SHA-256: 96effbdae210045e90f33644c7199b62eda4c51e6e40441412be2e574896d09f

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