Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a30ba3c47c686e…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 15:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f581d0879a7fc6f7205d682fb72abe61 SHA-1: 83e45b9c25bd0530d2f1e8e003aa1acde08dfe7d SHA-256: 76a30ba3c47c686e2daaa1c664894f20eedd94db4362ca964edb37a69523617d
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/uirbx.club-free-robux-hacker-p-game-hack. The document body and heuristics suggest a lure related to free Robux or game hacks, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/uirbx.club-free-robux-hacker-p-game-hack In PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/competition-for-free-robux-no-lie-still-on_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22504 bytes
SHA-256: 73b10eb9f6c81c1abf754d77160d977daf6a06fcd500453df8cf18bc42aebe19
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 19300 bytes
SHA-256: e9de854688da9c0273ed56477ff6d93b555b55787246dbbed51af60be4cac82b