Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6df4fea8d8a97c0…

MALICIOUS

PDF

31.2 KB Created: 2021-07-19 11:21:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d3ccf36e89ba6e2effd849aea8703cc2 SHA-1: a450ef75a82c059ffa83f72d0ffe31e1616f8168 SHA-256: d6df4fea8d8a97c0e4d616a1415915c6d5fbf92f95f60d81f181176d9f18bdc1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs social engineering tactics, specifically a lure for game hacks and a prompt to install browser extensions, to entice users to click on malicious links. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-to-get-hacks-on-roblox-game-hack, which is associated with a game hack generator. The document body and heuristics indicate a clear intent to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9537

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/431946152/how-to-get-hacks-on-roblox-game-hack PDF link annotation
    • https://selesindihome.com/ckfinder/userfiles/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://selesindihome.com/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://selesindihome.com/ckfinder/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://selesindihome.com/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://selesindihome.com/ckfinder/userfiles/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://selesindihome.com/ckfinder/userfiles/files/tiktok-followers-for-free_GM835599320.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_off000026c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26C0 21760 bytes
SHA-256: 16bab05b371c714a449da06795c817305c906fb9d259c5a437e1a0e8e180565f
font_01_sfnt_off000056c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C5 18636 bytes
SHA-256: d2de202f9aa25c491956fe63874a7d79bb7bc74997408c256f0bbf2d62c0ce59

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