Malicious PDF — malware analysis report

Static analysis result for SHA-256 7817fd4b7b4f6107…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 20:59:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 17c43efc9a50a9e7932625e0a6acc672 SHA-1: 1aa861f59df5b9c08fa4043f81829c9d28850307 SHA-256: 7817fd4b7b4f6107b7876486ae28cc88d4533247fa1852b03a676947717cb16e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, a common lure for malicious downloads or phishing. The ML classifier strongly flagged this PDF as malicious. The presence of these lures and the high ML score indicate a high likelihood of this document being used as a delivery mechanism for further malware or scams.

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/pro-gaming-hacks-com-roblox-game-hack PDF link annotation
    • http://educhina.mn/editor/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-car-tycoon-hacks_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://robuxhaxs.comIn 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_003_off00004bda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BDA 26676 bytes
SHA-256: ec1143c93c53eacd6459548f7b7332df6872ac71f872787ff2b4aff3592fccfc
font_01_sfnt_off00008aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA7 19004 bytes
SHA-256: 0f98b54bbbd18186469e9c54f8433f377da03f10c2c0e0441bc9697f3d8bac98

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