Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9299cfcb816b75…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 00:41:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5eda651617d07f78e828c777fdf67070 SHA-1: e5d4d0fe401608fd82ee7ad056ca6f7412316110 SHA-256: 3d9299cfcb816b753268434d65adb9cbd1735c3b0ff9c4f80aa42e5a3dce650d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for "free Robux" and "game hacks", directing users to a suspicious URL. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/get-free-robux-now-game-hack PDF link annotation
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://www.e-learning-manberau.com/__statics/gudangsoal/files/free-ways-to-get-robux_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
font_00_sfnt_off00002f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F30 21740 bytes
SHA-256: e8d52f64e286fdfa7e0dac029565d6721627c044f2162e4086869dfbddc26cd8
font_01_sfnt_off00005ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 18468 bytes
SHA-256: 952cd73f503fc30f976e7becd71335f77916a99414e1f81ed868d11088280245

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