Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c6fabd87587759…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 09:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f9a78d1b256901beee65212cd709724a SHA-1: b62e2792e240c84060e83344c86801ed44aaa375 SHA-256: 27c6fabd87587759bfdbcd1925ba0405e4c9791d570406c0afb74222ad2a000f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a lure for free game currency and hacks, directing users to the URL http://netcdn.tw/app/431946152/free-roblox-gift-card-game-hack. This URL is associated with a high-risk heuristic indicating a game hack redirector. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-roblox-gift-card-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/apps-that-will-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/what-is-tiktok-make-your-day_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/pastebin-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/pastebin-link-for-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-august-14-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-coin-master-spins-link_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_off00002eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB1 22328 bytes
SHA-256: 5c87c9875cac8c94ba8877344baf5e519a73f4eb3e238acfcb728494ee2ecd5e
font_01_sfnt_off00006051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6051 19048 bytes
SHA-256: 7751f256669591ba1b6163ee6eba71e2718081a78833b13667734d85569e04b5

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