Malicious PDF — malware analysis report

Static analysis result for SHA-256 515762bb6cb0c5f8…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 13:07:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0e842fe91361139e87a9474c671a92e4 SHA-1: 9d507cd24afc008ff6ab8f1493787a7fce3794fc SHA-256: 515762bb6cb0c5f860049ebf48c9725952227f96cbf964854ae84d4ea63aa54e
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 0.9942

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/coin-master-free-spins-daily-game-hack PDF link annotation
    • https://www.zagorjeadventureteam.hr/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-do-you-hack-roblox_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_off00002c81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C81 22844 bytes
SHA-256: e933a628bb073bc5e48ed9cc73db099713b1892dd9fa7c52d63078234ec76fc4
font_01_sfnt_off00005fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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