Malicious PDF — malware analysis report

Static analysis result for SHA-256 e643a3e17f370dbc…

MALICIOUS

PDF

40.1 KB Created: 2021-05-21 19:56:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 288ff3296f224e9c7df39549a8b3293d SHA-1: 730d5e419bfb077298d935376332534dd471872a SHA-256: e643a3e17f370dbc82606fbf626badd0c65458d79b1f953e276fe52a7b0b6265
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action to access 'free robux' or game hacks, redirecting to a suspicious URL. The document body and heuristics indicate a lure for game-related cheats, likely leading to a malicious download or phishing site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/www-roblox-com-free-robux-game-hack PDF link annotation
    • http://classicskitours.net/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://classicskitours.net/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://classicskitours.net/images/is-tiktok-app-free_GM835599320.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_002_off00003279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3279 32592 bytes
SHA-256: c47add7317c885d1d795975e551b2eb97a1f1f63f99ca44f930437be26f6e8ee
font_01_sfnt_off00007aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 18708 bytes
SHA-256: 62c028800c68fb05578d3bf96b402573c397accdba69624e3c020ffc1692f811

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