Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fca57d65e55351a…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 21:17:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4cddb03800cdd46f59cbcf8cb7f551e SHA-1: aa3d55a44b7107b6f704b409c5e30f3e539408fa SHA-256: 4fca57d65e55351a7a3a890bd042a3a1aa32be5d76c842affafb89933d8f3db3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to pages promising game hacks, specifically for Roblox. These lures are designed to trick users into visiting potentially malicious websites. The ML classifier also flagged this PDF as malicious, supporting the assessment that it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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://netcdn.tw/app/431946152/roblox-speed-hack-feb-4-game-hack PDF link annotation
    • http://aks-akk.ac.id/html/perpusakk/repository/is-hacking-a-roblox-game-illegal_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/hack-roblox-rose_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-hack-the-streets_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/hack-roblox-using-command-prompt_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-more-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-money-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/isuku-roblox-free-shop-t-schirt_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-gems-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-kill-hack-script-fe_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/hacked-by-roblox-i_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/safe-free-robux-no-password-or-human-verification_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/nopde-engine-64-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/dll-hack-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-youtube-robux-hack_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/robux-hack-pc_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/client-hack-roblox-2021-download_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-cheat-list_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-roblox-gift-card-2021-live_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-promo-codes-roblox-2021-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
stream_004_off00005365.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5365 26540 bytes
SHA-256: d9ba71aa506837551c9891f5fe989d823e0efb7ae29f2be055cdc7ca14b7345f
font_01_sfnt_off000091e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E5 18760 bytes
SHA-256: 20c0092689c56c5ec75e19afe10ed17a3df41780931d7c4c74c36ec9347a9397

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