Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ee97dbf8fc27f5…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 19:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 34e8610c03699c61fec4b67cea671488 SHA-1: 356d122f4caa0dc174f15006663614fe4ea8b5d6 SHA-256: 99ee97dbf8fc27f50f458eba19e0828045da22c488e23e2364d6a2f822579984
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text related to hacking game accounts and obtaining free in-game currency, specifically targeting Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs and document content suggest a social engineering lure to trick users into downloading malware or visiting phishing sites.

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/how-to-hack-a-roblox-account-with-brutus-game-hack PDF link annotation
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-draw-2-alpha-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-and-tickets_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/a-code-for-free-robux-script_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hack-roblox-apk-pc_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/i-have-been-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-easy-robux-cheat_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/new-roblox-hack-script-execution_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-roblox-rom_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/roblox-how-to-hack-gravity-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-group-with-free-group-refund-in-roblox_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-easy-robux-today_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/hacks-de-roblox-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/free-roblox-account-with-dominus_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/cheat-roblox-jailbreak-2021-tp-unpatched-may-2021_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-schrt-in-robux_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/dbor-roblox-level-hack_GM431946152.pdfIn PDF document text
    • http://sman1tembuku.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-in-roblox-using-cheat-engine_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_off00003194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3194 21728 bytes
SHA-256: fa64ddb7c989e7ecad7a55222a68524df29f448276cdb756c39853050e51e529
font_01_sfnt_off00006149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6149 19548 bytes
SHA-256: ff2154073db60ebe177e487ff2f04c3c9fc65c41998e69f81e4eb1297327ce87

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