Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b22fb9e67d0dfc…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 16:09:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 79cc500e2712d8368dd532ee0cef83ff SHA-1: ab86dc5a46cb2f201ea9b7915b560ee741c574d6 SHA-256: 22b22fb9e67d0dfc1f2362f3acbd691f938ca2491becfc63b0dcd617705f1fc4
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 0.9980

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 http://netcdn.co/app/431946152/roblox-faces-for-free-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-2021-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-cursor-hack-lock_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-a-youtubers-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-hack-2021-fluxx_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-made-50-days-old_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-admin-roblox-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-serverside-executor-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/worst-client_GM479516143.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_off00002f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6F 22588 bytes
SHA-256: a82f3664a7a87c947b13f3113aebd8fb2c48428ad3ba30bd5f28c4eaff7f6bb8
font_01_sfnt_off000061c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 18652 bytes
SHA-256: e009c69e5d575e619ad0b1e78f26c55fe1e414b57e2119bdd0bdf2977c24ddb2

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