Malicious PDF — malware analysis report

Static analysis result for SHA-256 967b2aa2d5968d21…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 00:02:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 040f428bb271e5f68a9c3796e4cc0d79 SHA-1: 3059c845ec1dd44d84ceb55ad17fec7c3541872c SHA-256: 967b2aa2d5968d217ee53334540f2cc4c7044a861002e85a6954c37a67927004
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://netcdn.xyz/app/431946152/websites-to-get-free-robux-game-hack PDF link annotation
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/instant-robux_GM431946152.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.beestonprimaryschool.co.uk/admin/ckfinder/userfiles/files/free-robux-without-human-verification_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
stream_003_off00004d8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8D 26332 bytes
SHA-256: 47580e70d50c46d58c58427d94eb16c95c928f1a13c7152b72c7bc333973fc94
font_01_sfnt_off00008b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523

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