Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4190ae64c84c4a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 08:49:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b1b3935b097a5c8921c541d5ce5e6e77 SHA-1: 18379c13eb94343cb8e72256a104843cdcb64197 SHA-256: ad4190ae64c84c4ad534cf784704f6aa917c6ec2f32d500ada49e73d860dfa27
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to free game resources and hacks for popular games to entice users. It contains multiple embedded URLs, with a primary redirector at http://netcdn.co/app/431946152/free-recorses-on-roblox-game-hack, likely leading to a malicious payload or phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

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-recorses-on-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/thats-cheating-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-free-outfit-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-download-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.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_off00002e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E21 22928 bytes
SHA-256: e43e04e65eef34bbb3e80f3dd32b5ca39e4dc8b6f121f462fa76d3bfdfe467e2
font_01_sfnt_off0000619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 18652 bytes
SHA-256: b8625703799bc850716a63cec7ff31eca23666225477dd49b8d97729b6c53b37

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