Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d35484f45691f1…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 12:03:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 91d1e438b3fb7895ffe529f717ef2391 SHA-1: f6fe303794f1f52ffcaa19a29433162d19952ba9 SHA-256: b2d35484f45691f1e73d7dfb7d030715b8bf5ada1d6ef4aaa6c577cd375d2087
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux codes generator' and 'game hack', directing users to a suspicious URL. This indicates a social engineering tactic to trick users into visiting a potentially malicious site. The presence of embedded URLs and the ML classifier flagging the PDF as malicious strongly suggest a malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-codes-generator-game-hack PDF link annotation
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-sex-cheat-code_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-renders-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/do-you-get-free-robux-with-builders-club-2021-bonus_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/admin-commands-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coinmaster-com_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
stream_004_off000053ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BA 25940 bytes
SHA-256: 50c54e695e76e693accf7d0e1ac74f9bcbb01c14874a1cf7c690ca3def5e4613
font_01_sfnt_off00008fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 18684 bytes
SHA-256: 71972d3c5928590b46bb5d5375b96ab735471efda9878505542171ed86879ac8

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