Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be3a39c85211ae1…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 13:55:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 208259c7f16bd13d554229a88c6d857b SHA-1: 7f20c7a12dc5c3f3db5b3aba73aec88e7ae70597 SHA-256: 6be3a39c85211ae1eeba00f77cf596d01fb6daaef5f4bc2262d95da84e7c9607
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to 'free Robux' and 'game hacks', directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/free-robux-no-verification-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/does-roblox-allow-free-rebux-websites_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robuxmatchcon_GM431946152.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_off00005392.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5392 28316 bytes
SHA-256: cc7f073b41d373703e52245ed7f61f8c00473dc63944fd1b133d20d9e782c14a
font_01_sfnt_off00009302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9302 18600 bytes
SHA-256: 361892a278de990f6dfe9fe9f512a0ec39aeba1740037781b92f32c6ad2b5051

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