Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b22ab6fed201c1…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 05:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e223b69690f90554ae24f7453098c785 SHA-1: 56eb3018c197061e5f893224a678a8091964eecd SHA-256: e9b22ab6fed201c1cc7c17d5ec827f28e52713b5152f79699339011b6e5ecd7c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure related to 'free Robux' and 'game hacks', indicating a phishing or scam attempt. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/pubg-uc-earning-app-2021_GM1330123889.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/games-that-give-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/robux-hack-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://www.das-partners.com/uploaded_files/userfiles/files/case-clicker-hacks-roblox_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_off000032f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F2 22104 bytes
SHA-256: e843d4493b94d216b37a462424e6e66c8e03954d74e8fc71ca7e303d35cdd5c2
font_01_sfnt_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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