Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab89da2eea4ded2…

MALICIOUS

PDF

52.5 KB Created: 2021-06-03 10:49:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7a13603dc791b6181744513266519745 SHA-1: a63657eee36e33897fc86b61d21d7e2348a67eb0 SHA-256: cab89da2eea4ded2f1c60ddd4aa389bf7fd1bb3db79cd00c12ebfe0c4c163692
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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.online/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-a-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-cards-for-coin-master_GM406889139.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_004_off000054a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A7 37272 bytes
SHA-256: 10cc73c75daae9681dd723c9eba861cfa7f2edca093d206bf81fc9a508e0b7f0
font_01_sfnt_off0000a790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA790 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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