Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd25308652dd5dc7…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 21:24:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ea112080aa626ee4128c4c0d9404e3e1 SHA-1: 50a0bbb2a6056e693c9702372e99df94df444b49 SHA-256: cd25308652dd5dc705da4f2fe481a5f00a698fe02733a112a2f77fc36f159360
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/free-robux-script-pastebin-2021-game-hack PDF link annotation
    • http://perpustakaan.ipts.ac.id/repository/roblox-t-short-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/como-hackear-assassin-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-abs-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/but-link-says-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_off00002ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF9 22236 bytes
SHA-256: 54c73dd160a232cdb1c760a19deecd2099eb3e1c746cce798dbc4dc5da0eacc5
font_01_sfnt_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 19672 bytes
SHA-256: 47c7df37cbe506e0482dad6f990516cf4bee7a8f27d244f637c3efbc5aae482e

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