Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b00bf48f12bb27…

MALICIOUS

PDF

39.6 KB Created: 2021-04-24 09:09:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 208c7018fb7aa12db1f26092b4f58c46 SHA-1: 3abb2951c1d43755811324608456776fb9f6c363 SHA-256: 15b00bf48f12bb2718caca4e80e347ad36932d2db738313fda7e156ee3edf361
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 0.9573

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 https://netsecure.top/app/431946152/free-roblox-assassin-knives-game-hack PDF link annotation
    • https://abellamoveis.com.br/ckfinder/userfiles/files/dominus-rex-is-free-not-in-your-inventory-in-roblox.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-by-downloading-a-game.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-cheats-how-to-get-free-gear.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-gift-cards-free-codes-2021.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-roblox-items-usuing-android.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/hack-icebreaker-roblox.pdfIn PDF document text
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-robux-no-copy-and-paste.pdfIn PDF document text
    • https://freerobux.cyouIn 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
stream_003_off00003fc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FC5 24884 bytes
SHA-256: f79f138980b6fb7dc37f5ee91e907a5e10533687752dfe1393a2735729abfa51
font_01_sfnt_off000078b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B4 18412 bytes
SHA-256: 78dedd5d925c48281e8292cccd4f89f0681088ac8ecbd19a1933226ee3450cc7

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