Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc4cc429c0a73b9…

MALICIOUS

PDF

33.7 KB Created: 2021-06-29 03:10:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6829fb01f9ee8bd2b20dd7f0480eaf67 SHA-1: 9188a5f0c5354c5ad19905be51655726877a92c5 SHA-256: 3fc4cc429c0a73b9fc790a7c770eadd9bc0225905880390de74a8fd94be9b0b5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and heuristics indicate it is designed as a lure for game hacks, specifically mentioning 'free Robux'. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-nicsterv-game-hack, is likely intended to lead the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a potentially harmful resource, likely for credential harvesting or malware delivery.

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/how-to-get-free-robux-nicsterv-game-hack PDF link annotation
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-skin-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/codigo-oculto-roblox-hack-roblox-tener-robux-gratis-2021-noviembre_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/airport-in-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/cheat-engine-superfast-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-ghost-simulator-roblox-september_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/xp-and-money-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-bc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-links-for-coin-master_GM406889139.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_off00002efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFA 21528 bytes
SHA-256: 22969da53e5e721e2a340837478bc491ff59dc707bd479d0b01464d0812cd64f
font_01_sfnt_off00005e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 19220 bytes
SHA-256: ebacacbc43f13efb7c0915d912883b8b5fdea01a6be8a1f4f7be5d1ef0d252ff

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