Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e459d212d1e5fd…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 06:26:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6dc05e10bdb70af29bef4f52df19edab SHA-1: f24b764638f22564469732401bbb36cbf5e7be34 SHA-256: d6e459d212d1e5fdd49552a7eee48777f1a825978f6aca4f216595723eefc088
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document uses a lure related to game hacks and free currency to entice users to click on embedded links. The primary link, 'https://netcdn.online/app/406889139/how-do-i-get-free-coins-in-coin-master-game-hack', redirects to another PDF download page, indicating a multi-stage malicious workflow. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/how-do-i-get-free-coins-in-coin-master-game-hack PDF link annotation
    • http://oca.undil.tl/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/which-pokemon-go-free-server_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/haktuts-coin-master-free-daily-spins_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_004_off00004eb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB0 29268 bytes
SHA-256: 0f7e843fa9da3182aa5d4ccb2a81286de1db84cd32709ad5851a5d686d6cebb6
font_01_sfnt_off00008c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C73 18044 bytes
SHA-256: a7eb4611cc5e19625cbf9eb325c611c19de71162a0200f7ffd184f09f4ce8017

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