Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b37ed2467bbfad6…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 22:33:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 837c5c9e7961e292163af8b302c187e1 SHA-1: abe268bb779ee757dbfc441e06682dd21e6ab012 SHA-256: 9b37ed2467bbfad6ebe18ccf157512033b962ef9d059d973fbf907cac515e90c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9971

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.xyz/app/406889139/coin-master-hack-facebook-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coin-master-cards_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
stream_003_off00004ba1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA1 25288 bytes
SHA-256: 778c6bee667ca42c00a995192d6ba88067aa9f912764bc4ff7acd890fb7e619b
font_01_sfnt_off0000832c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 18040 bytes
SHA-256: a8842bd0617fa86dd082827eea584dec3a7ee10a35fb1e5666a6d76cd5718c44

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