Malicious PDF — malware analysis report

Static analysis result for SHA-256 666facb3bf38f1a8…

MALICIOUS

PDF

33.8 KB Created: 2021-07-26 08:54:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ea81f74463f0dc449b5c6aebff9d77e3 SHA-1: 76331fe31c1773129dc7ebe2a7ed304103983ff8 SHA-256: 666facb3bf38f1a8199d76043253b3cb35c569d812206ab9d2eabb53c4bfeb70
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 0.9946

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/free-robux-games-that-actually-work-2021-game-hack PDF link annotation
    • http://genialica.com/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://genialica.com/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://genialica.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/coin-master-free-spin-and-coin_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_off000029d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D1 22816 bytes
SHA-256: 4e5fa32de1473c6baa917498b824698129e8f06dbb5066c0aa63fe3c1f8495b1
font_01_sfnt_off00005d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 19980 bytes
SHA-256: c5a26cb5107a04c6f1ee35fb00bfc17e87ec921a407127f2def7e928c8550b77

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