Malicious PDF — malware analysis report

Static analysis result for SHA-256 6649e4cecf9c1419…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 16:19:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c30f6f4da8d56d7c05594a88b413ef74 SHA-1: 292783457549995b5bf4297063404dee7abbaa5a SHA-256: 6649e4cecf9c14197b183f35ffd91ee650ece0cb0c6abd780d1d88eafe7b25cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to game hacks and free items, specifically mentioning Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL strongly suggest a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the document's structure and content point to a malicious redirection to external sites.

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-head-spam-glitch-at-roblox-high-school-legacy-game-hack PDF link annotation
    • http://zercalo.org/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-strucid-privet-servers-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/cheat-codes-for-roblox-skywar-how-do-u-get-costums_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/no-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-elemental-battlegrounds-hacks-win10-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-do-you-hack-roblox-and-get-player-ips_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/get-free-robux-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_off00002f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0F 22652 bytes
SHA-256: 93363d28786bf010a80b8ea74d6fa1a9d7e1689cb3055878a48e2debef8d24e7
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 19644 bytes
SHA-256: 0135da0c8c151acefe830df559879c75ffdc7d69eb98d847167d6bacde20b2b4

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