Malicious PDF — malware analysis report

Static analysis result for SHA-256 95551481379d1d01…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 19:36:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9548ea00688ab0fefbee425645ad9001 SHA-1: abd96817074847c363f4a259b04e5b9b230d4928 SHA-256: 95551481379d1d013995b3dff413b188303d8a0cfc4c6c3f23634aa53bf5351d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a prominent link disguised as a 'free generator / game hack'. The link, http://netcdn.tw/app/406889139/master-coin-free-link-game-hack, leads to a known malicious domain. The document's content and heuristics suggest a social engineering tactic to trick users into visiting a potentially harmful site, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/master-coin-free-link-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/giving-away-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/level-coin_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/pastebin-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/vehicle-simulater-roblox-hack-for-speed_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/sites-for-free-spins-for-coin-master_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
stream_002_off00003014.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3014 23280 bytes
SHA-256: 030217cec17fbb1f5899e0fddc121df95e297891371329725b85e506dd042b7a
font_01_sfnt_off000064ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BA 18168 bytes
SHA-256: e450dc423028427b486fcd2b5a338852c4e54ca04eb5a94dcf465bc91229717c

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