Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9fb5e9460e8b7a…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 14:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5995afcc53248f0a6b9b91173001f421 SHA-1: 0b9ca90e4798667cbe3874df335d5b27885c2318 SHA-256: fc9fb5e9460e8b7a2447b8a7ebc98a6d2f788743635e2f39b1936587681f5b32
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing game hacks and free currency for popular games like Roblox and Coin Master. These links redirect to external sites, such as http://netcdn.co/app/431946152/robux-hacks-tay-take-off-newest-game-hack, which are likely used to distribute malware or conduct phishing. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

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/robux-hacks-tay-take-off-newest-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-home_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-builders-club-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/wizard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/script-to-free-objet-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-hack-mobile-generator_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_off00002f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F 22332 bytes
SHA-256: 078521b7b1a86501457909e2a3694a9364673c8b768cc81a4ad0d4813ee35ab0
font_01_sfnt_off000060e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 19168 bytes
SHA-256: db3d5153223e7ecac212d0ad5198151569661c0c847b0095e666f742014766ef

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