Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a08e8fd447b64a…

MALICIOUS

PDF

51.5 KB Created: 2021-06-03 23:59:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2507478ddf372dd0be324683876b3b2d SHA-1: 41b611e323921917382356515ca6db9d274cca1b SHA-256: 82a08e8fd447b64a44b260cdf64cbeaa508d9685666a8ef4b99a15665595edae
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to 'free Robux' and game hacks, combined with a fake CAPTCHA prompt, to trick users into clicking an external URL. This URL, https://netcdn.online/app/431946152/roblox-games-that-give-you-free-robux-game-hack, is likely the next stage in the attack, potentially leading to malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/roblox-games-that-give-you-free-robux-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-money-hack_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_off0000525e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525E 31556 bytes
SHA-256: 8c8663e8d4145ab058514e830e1f873857672892239a2f488557bb907d596d11
font_01_sfnt_off00009740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9740 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA451 19240 bytes
SHA-256: af18d9cb6acc741702b59c78a5d378fdddaa2c6ad6fac2421576a1d1ac5dc213

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