Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab85f0dc4033379…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 22:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2a4923c62197cd284902dbb0f858116c SHA-1: 74d48f0755280cee5f23f048ad5ffb6f2f1ab851 SHA-256: 3ab85f0dc4033379198c754f01f45a8463573101f221504e4915cc951e1b79f4
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for a 'game hack' redirect lure, indicating a social engineering attempt to trick users into visiting malicious sites. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing this attack pattern. While no scripts were explicitly extracted, the nature of the lures suggests potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-daily-spins-coin-master-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/tiktok-free-login_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/rbx-earn_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pubg-uc-official-center_GM1330123889.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
stream_004_off000051b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B9 26364 bytes
SHA-256: 50e618553795324128a0610c871b76d2193a51599b132f5dbee6e49acf0e1315
font_01_sfnt_off00008db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB4 18308 bytes
SHA-256: 55eaac4e6bbee5e06de7435d22c867d27a3c8151a397b13177f5239675c95764

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