Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfb916f48d6de46…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 07:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74e17a4f1fab597432e56d16d44bfe66 SHA-1: f9fea131def5772dd31c3a59c03e1e382ba37ae5 SHA-256: cbfb916f48d6de46d86b4898268d7a536905a1fe8011441b53d60b3f49485250
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-get-roblox-premium-for-free-2021-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-witout-paying-or-doing-nything_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/equillex-how-to-get-free-robux-and-builders-club_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-ranks-up-in-a-roblox-group-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-real-no-fake_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-bundle-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-obc-2021-discord_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-hack-2021_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_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 23016 bytes
SHA-256: 6af1375d5e22106b60a668941d90f7c92f6c84f2841dd0423681682cdb2b5678
font_01_sfnt_off000064ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 19992 bytes
SHA-256: 5d92c0ac708cb6372069878ce274a0583dd4db4fed5f7a9ab4827dfd753440d4

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