Malicious PDF — malware analysis report

Static analysis result for SHA-256 791d831cdf7d7a28…

MALICIOUS

PDF

52.5 KB Created: 2021-06-02 12:38:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 69720512093f32d02ea20fd267e57638 SHA-1: 66085863d9a7d48e76e3f3cc2dc9976395e612ac SHA-256: 791d831cdf7d7a289240e058cc45e9666324d531aebc064897ccb696c76f1420
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically https://netcdn.xyz/app/431946152/ccv3-roblox-cheats-game-hack. This lure is intended to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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/ccv3-roblox-cheats-game-hack PDF link annotation
    • http://bgnails.nl/images/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000530a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x530A 26396 bytes
SHA-256: f415b5d7c9709cdd356bb35f4647147ffc53cea82b1eb1a6b9d1c80f49b85935
font_01_sfnt_off00008e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8E 8252 bytes
SHA-256: 7ebedd6b182173c8e55836cb0d114b2c4a0ac85c96a51b9f0706c935f8415fea
font_02_sfnt_off0000a9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A3 18568 bytes
SHA-256: 194829d997d10c2f5a36ecc5fcc8dd4c8088886964464ec62918c511c58313fb

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