Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5e14fc84d6a02a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 03:15:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 33185f3baf7ab071b6381f90ea3da25b SHA-1: 1e9564abcf061c1345771cacec98ba1faca308c4 SHA-256: bc5e14fc84d6a02a8ebbc8954a7c9b9cc8f76b7945f1509f574b3afe20607542
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is likely intended to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-with-no-human-verification-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-demo_GM479516143.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_off00005231.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5231 25260 bytes
SHA-256: 899c54c2ce43eb18a3d76dae9f20f35e73af439b4e19b920b4a116d57b8e23ea
font_01_sfnt_off00008b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B07 19224 bytes
SHA-256: fee2af4c7f09d7ea12136e2767a6473cb73ac52634d47b0a6a367e18f3240d40

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