Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce25e99b1e44b9a…

MALICIOUS

PDF

51.4 KB Created: 2021-06-08 18:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 083bf07e4aaf6ee587b1227a8e8c0037 SHA-1: 808866fbb7a0428dc024e4dbda08e611f73a4e49 SHA-256: fce25e99b1e44b9a2a8e44cabdc747d06b06c906e378ebd5a35aa7de8cd6e89a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a fake CAPTCHA lure to trick users into interacting with a malicious link, disguised as a game hack. The embedded URL leads to a site offering "free generator / game hack" content, which is a common social engineering tactic. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user curiosity and potentially lead to further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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.tw/app/431946152/paginas-de-hacks-para-roblox-robux-gratis-game-hack PDF link annotation
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/tiktok-free-bot_GM835599320.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005257.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5257 25248 bytes
SHA-256: b9037acdf1e5a14f278dd984d1fd5ec6f333f468af45756767825a5fba70932f
font_01_sfnt_off00008c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9665 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA377 19156 bytes
SHA-256: cdd942bfa768533e06b40bf3938cd594e7c6aeaf3aea9062e5fb2f1656ff700d

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