Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a48992ff07b35e4…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 20:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fcdc9d3444774808a86fc537fc901649 SHA-1: 2dadf2cc28a6aa94cb8e948e2a2834f83f1f683b SHA-256: 1a48992ff07b35e4ddca166d7b61894ea836eb2f96ca2d69934e1fc1f9d79f62
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 0.9980

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/coin-master-50-spin-link-game-hack PDF link annotation
    • http://librarystkippgribl.com/repository/get-free-roblox-bucks_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/100-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/javascript-robux-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-games-with-gamespasses-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/comment-hacker-des-gens-sur-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-bedrock-for-free_GM479516143.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_off0000318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318F 22816 bytes
SHA-256: 97d066916ffc6ce2bb167e3989bac9fc6ea3554c9e27cfc352e2981efde2e4ab
font_01_sfnt_off000064b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B1 18488 bytes
SHA-256: 37897e2222ede790a36c73bbbaa69d613fe54b38594df75a542e5c224c9460a9

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