Malicious PDF — malware analysis report

Static analysis result for SHA-256 f244bc9a4ec7dda9…

MALICIOUS

PDF

35.5 KB Created: 2021-06-19 17:08:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0eb8bd9d4401eebaa24601d1dc1064d7 SHA-1: a1bc5a78d915a0f6ebfccbf31bce1aea29d62bd0 SHA-256: f244bc9a4ec7dda902a7ec6d436ac0e49480288ced5ce92c3bcfc924133ab661
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 http://netcdn.co/app/479516143/how-to-get-minecraft-pe-for-free-game-hack PDF link annotation
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roebucks_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/pubg-uc-add_GM1330123889.pdfIn PDF document text
    • https://www.allsaints-denstone.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hack-2021_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_off000037c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37C6 22080 bytes
SHA-256: a0c163ef71996168ff26bfa015350fefbae419e7b1dd63a0fe0916b81165877a
font_01_sfnt_off0000684f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684F 18316 bytes
SHA-256: 6114a01aa91a9ce609c62e178085c324d68f94fc89260c1d3226e785dda6fa61

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