Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced8e1350cbf4aa0…

MALICIOUS

PDF

32.1 KB Created: 2021-06-19 14:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2db18e2f12af16c4098adb4ac16f51b6 SHA-1: e82f3ed0e36ecbc8fd67bccb5ec3518d632d6761 SHA-256: ced8e1350cbf4aa02d169c193ac41a4654148f0d5cfec08505f58130cddf7bad
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 0.9824

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-cheat-game-hack PDF link annotation
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-boy-hosting-2-7_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-accounts-nov-2021_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://www.longford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-link_GM406889139.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_off00002b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B86 20940 bytes
SHA-256: cda9a6ad74d9f1834beb7a8f1c31b89e984a26829df909b0c1421d10e7abcd49
font_01_sfnt_off00005924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5924 18820 bytes
SHA-256: 37f2cbed7862a525c1327ce05c27341cf40a6b7f3d64c9c700a10f02169ccde8

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