Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3eb8f56080a1cf…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 22:05:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 779d19c76bacf3310effc4d6358711aa SHA-1: 5ddde5ce4a69cfe1dc5d6f7fba6445060a194adf SHA-256: 2e3eb8f56080a1cff4ee9fb5591c103be6b2311c3717cdc0b06a421ca05cc15b
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a game hack, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a potentially harmful site for further exploitation.

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/coin-master-free-account-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-link-spin_GM406889139.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_off00005221.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5221 24936 bytes
SHA-256: 48ef1ca68f2c6ae62aea2ee1ac1cddffa787d8daea44c62373e7eec3e9254ff3
font_01_sfnt_off00008a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A31 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000093d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D4 17848 bytes
SHA-256: 81db58af0d0a7c54bfcbf00b0a30aba5f5662412ae545e00ecca40055587a372

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