Malicious PDF — malware analysis report

Static analysis result for SHA-256 689b3e336f7d5f47…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 19:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ee5f087f2d434fb5d1ad79d2105e729e SHA-1: 43b499152647c2135171b03d68a0606fd18f616f SHA-256: 689b3e336f7d5f47d13cc246fb18d0d64ced969ad1d8e0e70cdc05e62b2bcd77
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 0.9980

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/406889139/how-to-hack-coin-master-using-es-file-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-robux-hack-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/god-mode-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-clothes-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/best-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/download-to-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-gift-card-free-no-human-very_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-no-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/wwwmyrealgamescom-genres-freegamesdownload-index3html-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-mod-and-hack-client_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-download-pc-windows-7_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-redeem-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-on-people-roblox-account_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/unicorn-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-there-a-safe-way-to-get-free-robux_GM431946152.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_off0000317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317F 22720 bytes
SHA-256: 84a0ee40ea343e2c24342ee63d1386533ec582118336315045ffa065e0ccf0b0
font_01_sfnt_off0000647c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647C 18592 bytes
SHA-256: 9f5be4458162f88b8106d8459438f6a033b33521919b4f61ce35f018954fc42f

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