Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b799cd8a05de3ab…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 08:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a4705367c696ddb4c50c10cee70ba0bf SHA-1: eb01674acdcc08e401a82f32f899dae3ad4cbdec SHA-256: 7b799cd8a05de3ab02ea8ac326c9d8b08bc51b5ad7464d8c6338f0dd54f5f5e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL associated with game cheats. The document body, though partially garbled, also contains references to game hacks and the same URL. This suggests a social engineering tactic to trick users into visiting a potentially malicious site.

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.tw/app/431946152/hack-para-adopt-me-roblox-game-hack PDF link annotation
    • http://www.fluidtech.hu/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-use-cheat-engine-67-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/mathep_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/cheat-codes-in-endless-treasure-quest-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-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
stream_004_off00005292.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5292 28468 bytes
SHA-256: 111da766553082a6b65f22bf3a1b379e6f0018e1a94d4f323b5b7c9c8f615ba0
font_01_sfnt_off00009206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9206 18984 bytes
SHA-256: 6976a48e9e88365ee7c069d2da5b1fe5e132a83b0488bc970aacbe5fbc92fa06

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