Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c413733adf1fb3…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 18:15:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 386cc7b33525d69a84d127e0d88583ae SHA-1: 39da3a5f9bb1690e27460b581e42d511a4cd3f3c SHA-256: 04c413733adf1fb37d9f57223c00a0d4e059ca0979e67a3f0aa9a70f9c387242
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/free-robux-no-offers-game-hack PDF link annotation
    • http://razredna-nastava.net/files/roblox-mod-menu-free-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-pet-dog-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-does-cheat-engine-still-work-on-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-esp-aimbot-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hellowen-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-online-coding-courses-for-kids-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-on-roblox-saber-wars_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-bc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/aprender-hackear-en-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-cleints_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_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 22980 bytes
SHA-256: 6630e9dd49dfafc8f9f9c713050dea9b2c977218305f64f36a90ac4dc12050cb
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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