Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ddfb4d650df088…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 10:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 92247f9d327bf3d3fb518421cbaf8964 SHA-1: 04ceac43018b4ccbbad5d5ef1f4b9bc202edc855 SHA-256: 97ddfb4d650df0889427afc3f75c83978963ee543e11ae9c8d812581dcccabc3
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free game currency ('Robux') and game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the 'game hack' lure suggest an attempt to redirect the user to a site that may host further malicious content or exploit.

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/431946152/to-get-free-robux-game-hack PDF link annotation
    • http://akbidprimahusada.ac.id/elibrary//repository/robux-money_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/cheat-roblox-knife-capsules_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-cheat-engine-noclip-fly_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/carding-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-for-roblox-piano_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/pastebin-roblox-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-bot-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_off00002f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9B 22660 bytes
SHA-256: 556c08fe842084730ad2c0c623585347c1f5f429571d87f7b54c085be46ed0f1
font_01_sfnt_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 18820 bytes
SHA-256: 8945f1685ed6de98f8048baf7c49d81d2d868232d273679e20707c637152a071

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