Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bd39b07dc17ecd…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 20:37:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f676103b9c924b543af8cbd52a830f26 SHA-1: 12f2f7ec6fe1b501cb8dbda3d62e3eab19ce6164 SHA-256: c5bd39b07dc17ecd570d86cedd72c6ff42197c8c5a5fef522b4ab7aaa1e296b6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/robux-generator-without-human-verification-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-spins-and-free-coins_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_off00004743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 24440 bytes
SHA-256: 230e9ac31d942cd2520e429afa9000d2e175f0fd2d9b9a2ea7b029a7e19e04fc
font_01_sfnt_off00007fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA4 19060 bytes
SHA-256: 0b726b9d6aa2dbbe5db30d67cab0ffdd1f5741338f472823ef6d39bdf2cbc11d

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