Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da99cbf09b7aee5…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 08:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47ee23592303bdc525f3a3ea06bdcad7 SHA-1: 1b0988e199cec1cf1c96c6f68d3f032d09cd778d SHA-256: 8da99cbf09b7aee5dcfe0de64d460928e052caedf3516f191d8500fc0ba87e0a
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-ban-users-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/add-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-cheat-enginescript-injector_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-logo-maker-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/hacks-for-blood-flow-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off0000307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307C 23404 bytes
SHA-256: 374a566a70f42bf578f643ef5e9258e36164efeb0668bed56aee195b578d33b8
font_01_sfnt_off00006532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 18656 bytes
SHA-256: be4fd2bd497eaae89ad21655a7f430e3e8640ceea09971b6548cacbda1752271

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