Malicious PDF — malware analysis report

Static analysis result for SHA-256 6628d84227ed7268…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 15:20:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f623b955f569e3d3b0f70306419ecdfe SHA-1: fc89ca16cc29b42624950c24aa76a2a84c110ee7 SHA-256: 6628d84227ed7268fe360e646e16504d1c4eabbef7f4621902ac53e1e0ef7c25
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game-related cheats and currency, presented under the guise of a fake CAPTCHA or verification prompt. The document's content and heuristics strongly suggest a lure for users to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.co/app/431946152/free-roblox-card-codes-december-2021-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-mod-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/prison-life-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-5-million-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robloxbux-us-generator_GM431946152.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_off00003120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3120 21220 bytes
SHA-256: 10be83a2766476f4d03c05b8076eb86913e3be6704fc5fe09fe88984149fc604
font_01_sfnt_off00005f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 19656 bytes
SHA-256: 20e63226e1eea2be5b0a81aa0a08c44e3a5bd4032e8480e483f52a6a468f5dde

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