Malicious PDF — malware analysis report

Static analysis result for SHA-256 527e67cfd326bd49…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 09:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df38d2fe91443431b56ecffa4f54cd86 SHA-1: e0eaf8c4cf47e09e43600dd684814059f46984ca SHA-256: 527e67cfd326bd49542228f05abf764d6f21d0219132751e3e90fb642c1b1a40
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were directly extracted, the embedded URLs are the primary indicators of compromise, likely leading to a second-stage download or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-gifts-coin-master-game-hack PDF link annotation
    • http://hometech.tw/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/open-coin-master_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/dailyrobux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/hack-coin-master-game_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_003_off00004c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C46 25372 bytes
SHA-256: e4453a74863fcf919bcac8ebeab5aad2a09ebd6960f7db19c54f6c6dca5e295f
font_01_sfnt_off00008621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8621 17712 bytes
SHA-256: 982f424818d2cc6c65a12e1040d006be3e19cba50bc69db2ca0f75fa75a43871

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