Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0125b2f62226019…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 03:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0ebf89e75ca5725c62247ee6e0184cd4 SHA-1: 2d5745c4e813249857e806418057f654918dcbfc SHA-256: c0125b2f622260192366508f4be62f237a02f4de39ed44352ecae554bd15e519
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and embedded text promoting 'Roblox Robux Generator 2021' and game hacks. The heuristic firings indicate that these links lead to redirectors and potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and structure suggest it is designed to trick users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-robux-generator-2021-game-hack PDF link annotation
    • http://118.98.227.172/opac/repository/free-france-roblox-flag_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/free-robux-gift_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/comment-hacker-roblox-android_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-without-downloading-or-human-verification_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-red-shirt-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/aplicacion-para-hackear-roblox-i-tener-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-cheat-menu-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-hacks-on-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-750-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-com-free-stuff_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-do-i-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/cheat-engine-roblox-bypass-2021-no-admin_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/official-coin-master-free-spins_GM406889139.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_off00002af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF7 22480 bytes
SHA-256: 1db7b0b179e651a86d84478dc7dcd2355b2ca7f040890a4a39fa6c449709b88d
font_01_sfnt_off00005d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3F 19132 bytes
SHA-256: 6401bcd129901e19178bc0ea301a18cd362f26daf5d55f3217fd4f2a50f8f5de

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