Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c9822646be184b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 13:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 30d6ab6f25a7adc55d416394c5b75d17 SHA-1: 787dc095b7ccc518ffd7937b7331fc9e8e4121a9 SHA-256: 52c9822646be184b2e2bd803d86d3c7cda0641f9c85b940e0cf39450bb2ebfb4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to the URL http://netcdn.tw/app/431946152/free-robux-pins-game-hack. This URL is embedded within the document body and is likely intended to redirect users to a malicious site for credential harvesting or malware download. The ML classifier also strongly flagged this PDF as malicious.

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/free-robux-pins-game-hack PDF link annotation
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/get-free-catalog-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-rap_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-roblox-with-an-injector_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-hats-for-free-no-inspect-roblox_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-you-were-kicked-from-this-game-do-not-cheat_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-link-today-facebook_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
font_00_sfnt_off00003244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3244 22304 bytes
SHA-256: 4f7ab92583cf60c62f650028389335674733a2ca5b254a8c1859c60b19cca7f2
font_01_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 18992 bytes
SHA-256: e2f6e7493aec948a310ee99e045c3bc4058c5863f97c0ca4c5f0464a4f6a53a8