Malicious PDF — malware analysis report

Static analysis result for SHA-256 effeeb2e7cff6b8c…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 22:06:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0dda7ee54b5707822386b9dfb6308cf7 SHA-1: 9240251142bf55d209cf175e3476150b334fb4c7 SHA-256: effeeb2e7cff6b8c591db16a43a3cb2ac9067095d56e6b462fe3df4fd212e60d
160 Risk Score

Malware Insights

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

This PDF file contains multiple links to known malicious redirectors and hosts further malicious PDF files, all under the guise of game hacks and generators. The primary malicious URL identified is https://netcdn.online/app/431946152/www-robux-game-hack. The document body, though heavily obfuscated, contains references to these lures and URLs, indicating a clear intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/www-robux-game-hack In PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/generator-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/tiktok-free-views-trial_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/what-tiktok-free-movies_GM835599320.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/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-free-com_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/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wolfzscriptsIn 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
font_00_sfnt_off00005050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5050 26952 bytes
SHA-256: 6c0796c9b882b05ff4019c12a07a01efc5389db6ebb43776f8197b9d520cd6be
font_01_sfnt_off00008d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D40 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000096f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F1 18212 bytes
SHA-256: bcccb1e001e2f5e7ef72a5433eb4dc11bdbc574927e5f5e748e53d7576d93cee

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