Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf86c6e43182b22…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 15:14:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ec1e5fbe3a51a5dbaf83d3ce5614ac77 SHA-1: f6a967969b9ab1a7125557f4cfea8c52b2edaf1a SHA-256: 1cf86c6e43182b227b14c70643acdb49a8fceecd64b00d87ce8e4618bb3ddbbb
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.tw/app/479516143/minecraft-free-download-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-roblox-controlar-jugadores_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/boku-no-roblox-working-hack-script_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/does-cheat-engine-even-work-anymore-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/dayz-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/insert-gear-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/top3k-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-values-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-mining-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-do-you-get-free-robux-2021_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
font_00_sfnt_off000030ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EA 21956 bytes
SHA-256: 25f70237e0db7508f997f4271ae65b644a5e29ac1b94e7a821246d72553925ae
font_01_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 18576 bytes
SHA-256: 06b239d8a28b1d5597486ea199a20c5d387b716390632991d2cfb7c0688950f5

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