Malicious PDF — malware analysis report

Static analysis result for SHA-256 459d019ee1a658ce…

MALICIOUS

PDF

35.5 KB Created: 2021-06-22 15:57:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: abca49781f17265884eb80e31ba62e3d SHA-1: 712031890dd0da1a3f8a51def49848bdaa7ee0ff SHA-256: 459d019ee1a658cea147404e2c4ba435affbaea208207651de7cc8514eecdb6c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency and hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URL is likely part of a phishing or scam campaign designed to trick users into visiting a site that may host further malware or collect credentials.

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/406889139/free-spins-coin-master-unlimited-game-hack PDF link annotation
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/rewards-roblox_GM431946152.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/pokemon-go-free-8-generation_GM1094591345.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.christchurch-burton.staffs.sch.uk/admin/ckfinder/userfiles/files/games-like-roblox-online-free_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_002_off0000332c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332C 22796 bytes
SHA-256: 8d5d39cf329dd2fc6989483096e26512eb7f075f5558bdbfb0ba4e0a62a20896
font_01_sfnt_off0000665a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665A 18868 bytes
SHA-256: 2ae514214ba8136a29dde69fcf4364d8dbb9380ba0bdd85285d9bbc1786d9168

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