Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8437fa41bf233d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 12:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0ce68ad12067b45af203429abf2ec774 SHA-1: 0890e4fa332547e0fff8dc8eb0ba270eefb69d17 SHA-256: 6d8437fa41bf233dcb284c525ae87e2fc02035b3b9a94a6d0d58ac3b1a4e7203
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/431946152/hack-roblox-booga-booga-2021-game-hack PDF link annotation
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/hacks-para-roblox-inparcheable_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification-and-password_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-chaos-washers-on-roblox_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robuxy-com-free-robux_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_off0000320e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320E 22472 bytes
SHA-256: 08aec2cdaf4694c50446fa3f124ada0a5d1f9122d9779309e2a1ba6d160affa4
font_01_sfnt_off00006398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 19056 bytes
SHA-256: b49cb64831b3313fd2fb4bfbce2c0888a44dde0cfaec8e495963e73ba565f2cb

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