Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25920d990bb94cb…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 22:02:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4600e744a5c673f5d8c17d43473c2c4c SHA-1: dcd70661e7c6660027f8a0f22ef12d7a0f9e1cde SHA-256: e25920d990bb94cbdbbadaf8384f03dc5095ddc92a76785da2da7365bbc95623
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9748

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 https://netcdn.online/app/406889139/how-to-get-coin-master-free-spins-in-email-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-balls-2021_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5025 24744 bytes
SHA-256: 9ee80c380d20ab54482cae5398ed4a2e848770ea522a029ebe0a374f40f6e802
font_01_sfnt_off00008916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8916 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000092c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C7 18384 bytes
SHA-256: bc53f1fb47f57c74fdee9351068e660e83537be046fbdaf3d8b5fad9dc1cd1bd

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