Malicious PDF — malware analysis report

Static analysis result for SHA-256 c947d85fe41e6110…

MALICIOUS

PDF

49.8 KB Created: 2021-06-03 22:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bbcf6a3b0c0afc71ade079270bb80e7f SHA-1: d30ad80251b498db1184cab04d7a44bee5707976 SHA-256: c947d85fe41e61109182c30a17c2952072b4e3e6b5e9979775c078b493519d26
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links and a heuristic firing for a 'free generator / game hack' lure, directing users to potentially malicious websites. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-free-online-game-game-hack. While no scripts were explicitly extracted, the nature of the lures suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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/431946152/roblox-free-online-game-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-generator_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://collectrobux.coIn 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_off000052cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CB 25480 bytes
SHA-256: 582a0658aafbe101429dd287c2b5feaae5e646ccb657207adc20dfce61b32381
font_01_sfnt_off00008e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E13 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F83 18556 bytes
SHA-256: df154610b6efbd4d042b7dd8e86d5cfe30e06380d3f41432299740dca1959b28

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