Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f252e1d49d080f…

MALICIOUS

PDF

34.3 KB Created: 2021-06-17 16:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6ada9b225795dc329dcec964793975c9 SHA-1: 39151f8c36ce3c30e78b522d9667eb6492331d2a SHA-256: d6f252e1d49d080fc7dd7c48617c80b06fc121bf97f41b31f65ed11bf97bd08a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document uses a lure related to 'Free Robux' and 'game hack' to entice users to click on an embedded URL. This URL, http://netcdn.co/app/431946152/free-robux-for-watcing-game-hack, redirects to a malicious site, likely to deliver a secondary payload or conduct further exploitation. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the link.

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.co/app/431946152/free-robux-for-watcing-game-hack PDF link annotation
    • https://library.iuli.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-change-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-tycoon-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/pubg-uc-shop-myanmar_GM1330123889.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/action-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/hacking-websites-for-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/cheat-roblox-pc_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-big-brother-cheat_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-hacks-18-9_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
font_00_sfnt_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22532 bytes
SHA-256: 2adbe20a79a0cf6ac4b40cb7d0003ec842ab949ad9791a564011fb193d81ee36
font_01_sfnt_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 19136 bytes
SHA-256: 7f5609cff066b5879d9062b91130ca5e509f7b1bfbbc144e553f39ba3acec50b

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