Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d13ad11e0240e59…

MALICIOUS

PDF

34.6 KB Created: 2021-06-24 05:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ec5e3f6f27fc2e28ff42c4453dfc89bf SHA-1: 435ff985cbe29ea928e831bdf1ec50f2e4aa01b2 SHA-256: 0d13ad11e0240e59b37e5d237413a3d7eed7917dc63c28c95abe5cadd4c7e346
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/minecraft-free-education-game-hack PDF link annotation
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/hurt-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-daily-bonus_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_off000032ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32CE 22548 bytes
SHA-256: a1b34a313d7e761a23a4152b344b88b17fb824418914b6f0c6698ebef5368bb5
font_01_sfnt_off0000648c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648C 18312 bytes
SHA-256: 71747bca5155dfb5055924941267075c47b2be630a4ccbb2a83b478b897f01eb

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