Malicious PDF — malware analysis report

Static analysis result for SHA-256 16be4269a94f8f30…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 09:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: edd6d449c65909aec270e505ac48ed3f SHA-1: 9f4f344236ddd806439476eb2f8f052292d6a37c SHA-256: 16be4269a94f8f3030d4e2df23d90cbf9989c3bcccb798d8c95684b89140517d
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 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-gold-cards-free-link-game-hack PDF link annotation
    • https://vodomery.kiev.ua:443/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/robux-sign_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • https://vodomery.kiev.ua:443/images/minecraft-marketplace-free_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
stream_003_off00004a60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A60 26584 bytes
SHA-256: 4d2f221e7f85294a2623b1f1a033f96450f70532a2241d04856df7ffd5d67ba9
font_01_sfnt_off00008615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 18128 bytes
SHA-256: 3c7d889e052bb081026c5a88f6ee2afe5bc892e32bf973502febc93f4313d009

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