Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d63943bd5221fc…

MALICIOUS

PDF

32.6 KB Created: 2021-07-21 01:54:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7cf08c1907560725cec843874e34efd SHA-1: 2abe1ab16edfc69170b7f4f0ed270d24ed1a43e1 SHA-256: 28d63943bd5221fc3e205c19f6e13893d845cbefaa8defa50619c2967823ec88
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 0.9900

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.tw/app/406889139/free-coins-on-coin-master-game-hack PDF link annotation
    • http://ilifemarket.ru/images/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ilifemarket.ru/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://ilifemarket.ru/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://ilifemarket.ru/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://ilifemarket.ru/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://ilifemarket.ru/images/how-to-get-verified-on-tiktok-for-free_GM835599320.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_off00002c0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C0D 22796 bytes
SHA-256: ed287256fc5adae401457a9fbc0f509b705b1c7c6ea54ded1f8d16b489bf1894
font_01_sfnt_off00005f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2A 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546

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