Malicious PDF — malware analysis report

Static analysis result for SHA-256 688c45efd42927ae…

MALICIOUS

PDF

46.7 KB Created: 2021-05-15 11:37:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 212394dc6f0893bc028f7cc522679841 SHA-1: 20bfb2142751dc286b88295fbc6101c834dbf6f3 SHA-256: 688c45efd42927ae646749dbf07c6db5ab6ff4c71acd226a0818b5c74de15155
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 0.8948

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/how-to-get-free-unlimited-robux-game-hack PDF link annotation
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C69 25584 bytes
SHA-256: dec8f78ee0819f2e310362f89ac7a964963389f76dca25d18471ae30fd1ebd95
font_01_sfnt_off00008781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8781 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off000091ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AC 19096 bytes
SHA-256: 9b17e9a23becacda63dddbc7f165c1e9b21e0166e4f27ededabbca260bf2e523

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