Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b77eed9adf3c8b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 03:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c4d1804f1377ccfe17d4869b913a5b05 SHA-1: bf52d565493885f449ac814f921cb705ccf172fb SHA-256: 90b77eed9adf3c8b5c07933988c9f3336094e974668297a006e18f7147eaeefd
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/roblox-speed-hack-game-hack PDF link annotation
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/pubg-uc-kaise-khariden_GM1330123889.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/how-have-free-robux_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-kingdom-life-in-roblox_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/retail-tycoon-hack-roblox-script_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/hack-scripting-in-roblox_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/hack-roblox-dragon-ball-rage-2021_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://urp.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spin-and-coin_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_off0000336c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336C 22000 bytes
SHA-256: 3ef7630c9ef549a77c304b7c4706414dde79b081a611c3063685ff2096fdca96
font_01_sfnt_off000063d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D5 19008 bytes
SHA-256: 0d35cfadd0fca3b252b73fcf83046c0556c80fc1b3ae89449d52291489f63b0a

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