Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2d258a805ccc81…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 23:00:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 87025a0d1d48a6209dbfd7f6f6d62e9d SHA-1: 4e75dff1438badb568c5fdc2ed79c1ee2af8283a SHA-256: bb2d258a805ccc81760bc001b924a2c0f080dd7aca1e99e760d3e20b9efd23bd
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.tw/app/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/there-is-no-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-2021-mai_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/script-executor-roblox-download-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-a-piano-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-a-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-money-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-server-hosting-with-plugins_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_off00002fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE8 21388 bytes
SHA-256: aba7604e1eaa329a950b7296b56a87505dc1a7ed2d2a42fe60f677ad932b5942
font_01_sfnt_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 18916 bytes
SHA-256: a6c15671334e5340958c859e9ef76faa3bd94e6af761e25462b4f2cfb72507dc

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