Malicious PDF — malware analysis report

Static analysis result for SHA-256 4790c4d052183103…

MALICIOUS

PDF

49.2 KB Created: 2021-06-11 09:22:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e5d820754616a358f3bf8f972c45719 SHA-1: 138a2b89e8bd1d71bf2cde1da8a08762d7ca6bc7 SHA-256: 4790c4d052183103368106ec2e1bdbaa7a10b58cce417d0fcd2f7d2f8a081287
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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/how-do-i-delete-roblox-baseplate-with-cheat-engine-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-by-watching-videos-and-no-surveys-or-downloads_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/real-roblox-lumber-tycoon-2-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-make-your-own-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-sites-reddit_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/the-plaza-roblox-money-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-download-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-roblox-music-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/cheat-codes-for-roblox-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-goft-cards-generator-no-human-verification_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
font_00_sfnt_off0000534d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534D 25812 bytes
SHA-256: 86919eec285f56a036e161967a2b122ededb91f6b03b860b4676159f1fe63e27
font_01_sfnt_off00008d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D78 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A20 19396 bytes
SHA-256: 47c9e80ab353c2f86c8025e7d3ed7580809633b4a316ffb74cb370973bf3ab48

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