Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b648ea96589499d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 22:21:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b0f0c22195d0f4b6804af7f5e7aa84a SHA-1: 9a00cf8529cfcd8031c5b43d8e1e4d0ad873b06e SHA-256: 8b648ea96589499dd6f19a9df8094ad568eb4f5a2ddeff7ead676ff392d63ef8
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/minecraft-free-download-no-virus-game-hack PDF link annotation
    • http://librarystkippgribl.com/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/games-with-free-radio-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/admin-dll-hack-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-2021-promo-code_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pokemon-go-free-yanma_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/www-roblox-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_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 22060 bytes
SHA-256: e319ea1dc17d7ec72afbdb6d019bf0a180c7ec4dbfce4a227db6477d4700fedf
font_01_sfnt_off0000600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600D 18852 bytes
SHA-256: cb8dfb970cdf0d1864248e93dc40b53e7b02b918a2ad4072c45ffd8478cc91fb

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