Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfd8e444f421e80…

MALICIOUS

PDF

47.6 KB Created: 2021-06-04 04:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5c535868be1094f4f5d6f84e8c3bc5a9 SHA-1: 47e7c9d8d39d27cc223b3333cb29c9a50fd392aa SHA-256: 3cfd8e444f421e80a5038e52e4cf6c102a81d870022c8447da82be6e5e8e14eb
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 0.9832

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.online/app/431946152/how-to-hack-roblox-2021-game-hack PDF link annotation
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.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_off00005505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 29812 bytes
SHA-256: f6083820c55daea88fef85fe43051259b41fd01badb86832dbfb5b387c768247
font_01_sfnt_off00009609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9609 18748 bytes
SHA-256: 82830e686af2a9787477f8716b243dfdc4e826425849e85a18f820c98dc205f5

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