Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bd4a9f21c1993c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 19:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c636c84c449eb09acda9a6f481927a31 SHA-1: d9e2b727ef2b6cc4513892b9ef09b10cd369ed9a SHA-256: 25bd4a9f21c1993cddc5ed352e23b1a67e043e0f0c8ecef138746e0d59fa2756
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/431946152/robux-no-verification-game-hack PDF link annotation
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/hacks-de-comandos-de-admin-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-doungnquest-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/microsoft-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-without-any-verification-or-downloads-or-offers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-robux-2021-not-patched-read-desc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/hack-treasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/download-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-2021-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox36com-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_off0000314b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314B 23176 bytes
SHA-256: 41bb3086c88af5d0a28a69e1f5e07dacd3218fa726c853a6e203934367c341bf
font_01_sfnt_off00006581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 18912 bytes
SHA-256: 5371eeb4f32645909a106e2314d3e19630680129b8a7356391e2a50deb7f8a6b

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