Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a27eade9e85751…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 09:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9ce1babc3fcd633b944f7c7a09d2b96d SHA-1: c0f8dbdc5d8c47de2bd3116be4d6d3712ba05c27 SHA-256: 98a27eade9e85751a9df08daccf8a51d6b652bdc55855fda41216298873565be
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/free-robux-generator-no-waiting-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/tiktok-free-recharge-500_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-item-generator-hack-that-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.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_off00003053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3053 21700 bytes
SHA-256: b94fc1be31ea4a9a4d6367a4738e42d5ef4c77620f4d2bad70040b3855c44447
font_01_sfnt_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 19136 bytes
SHA-256: 3cccf3acb8a82ab4a62a56dd0d8b9b6f87a6babdcdd9a44857167acf80750552

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