Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fe01d26eee2997…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 11:11:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ada895b206cc5d2ab35c4c181951098 SHA-1: d65edb7fbbb38f7feca1a20fb3b923438fa9856a SHA-256: 41fe01d26eee29977d32d2662b39c0e232cbddfbb4c6a4be7dd143be334c6c16
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/406889139/free-spins-on-coin-master-game-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/mouse-ears-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacker-de-robux-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-other-players-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-robux-ohne-handynummer_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cheat-codes-for-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-app-for-android_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/cheat-code-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-giftcard-code-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-script-executor-lvl-7-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-retail-tycoon-116-hack_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_off000033ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BA 22720 bytes
SHA-256: 148bb20fb9364b194edcf95e9bc9ce523b2e6006bad982c370880b803fe1895e
font_01_sfnt_off00006699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 18432 bytes
SHA-256: 4593a1a2ad250b9c338d1094e610fce2cd2b7d4b85c0b8acce75d41d0f65b4d7

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