Malicious PDF — malware analysis report

Static analysis result for SHA-256 3690f8f0d2daf811…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 21:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e77d053c00512cf7db2ff59234d0fdad SHA-1: a40c7181fc88b550dcc2f9f0f8ac7a9c82ac4fcd SHA-256: 3690f8f0d2daf811004cc3e481cba4baf79acc7f172e8820cb79a76c19a8f5d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to the URL http://netcdn.co/app/431946152/free-roblox-generator-for-roblox-game-hack. This URL is likely part of a phishing or scam campaign designed to trick users into visiting a malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-roblox-generator-for-roblox-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/how-do-free-robux-sites-scam-you_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-robux-es_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-cheat-in-meepcity-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-50-dollar-card-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-a-free-dom-crown-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/rbxquest-earn-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
stream_002_off00002f92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F92 22572 bytes
SHA-256: 14a4944eb1f5651a12efcabb68f4b104b2aa56ef2d075922dafe7c4adfb7e58c
font_01_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 18752 bytes
SHA-256: 7a858cebcbb43583261fc6928f7757faac90e9e6cc2d406a534a148fe309e18e

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