Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3c1ce0b91ac0e7…

MALICIOUS

PDF

35.8 KB Created: 2021-07-09 06:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7468a1f87a1fc710dfff6cdb817aac01 SHA-1: 106ea4447b808db4e5f91d32fa9fc865e85571bf SHA-256: 2f3c1ce0b91ac0e7cc4012c578ab2ee9d96133455ec8a4abe476924cc579c30d
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/406889139/download-coin-master-apk-hacked-game-hack PDF link annotation
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/robux-online_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/hack-roblox-download-and-install-deutsch_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/roblox-how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-promo-codes-roblox-july-2021_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-promotional-codes-roblox_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/get-free-robux-instantly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://ntfdubai.net/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-blogspot_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_off00003331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331 23272 bytes
SHA-256: f1270bd873f7aba31539f80fd75a768303a27b27100d50b7db63c4ee4bc0d2f3
font_01_sfnt_off000067b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B9 18760 bytes
SHA-256: 730ee1d96cda19f7c4a03b449f27cedd631d74d7639b5d8272a7d4c4d2e1f6fc

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