Malicious PDF — malware analysis report

Static analysis result for SHA-256 73731ffab2fed304…

MALICIOUS

PDF

33.3 KB Created: 2021-06-22 11:45:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fded21f87340ff78013589e51c9dc57a SHA-1: 682e701be6834c3e8c26b31e53072cc790cfc205 SHA-256: 73731ffab2fed304e3151fe6766ecf81adab4e47fa07feddbeface4a81c65a25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game hacks and generators, directing users to the URL http://netcdn.co/app/479516143/minecraft-hacks-pc-game-hack. This URL is likely part of a phishing or malware distribution scheme. The presence of multiple similar PDF files hosted on a compromised website further supports this conclusion.

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-hacks-pc-game-hack PDF link annotation
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/robux-win_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 21748 bytes
SHA-256: 8add1fd0120c4f3297161aa500c41e7252e32f391372070adc61161dc63149cf
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 18180 bytes
SHA-256: 07b76f9baed0128e51c97dec540ec85ee324852e40b3966ddcd0b7b03af6c7e6

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