Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1839b5b375f9cd1…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 01:54:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 01503fb2a976eaef07ce69c4c39bebe5 SHA-1: 6e9fa32accd80dccd7c43228508dc2735bd17c37 SHA-256: c1839b5b375f9cd1acdf7c7c08bd4e3c6b3b19ad0ac6eee2c416b8d4fc0e7551
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with game-related hacks and free items, such as 'coin-master-free-stuff-links-game-hack'. These links likely lead to phishing sites or further malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection and potential exploitation.

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/coin-master-free-stuff-links-game-hack PDF link annotation
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/the-society-of-magic-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/roblox-collect-free-liverpool-scarf_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/free-avetars-on-roblox_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/best-admin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/roblox-gang_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/roblox-download-free-for-windows-10_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/volar-roblox-cheat-engine_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003245.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3245 22908 bytes
SHA-256: bb227755aa5428087458e9bc2f1ee2564613a861a8aca5a82b1ddac9a2c0ec36
font_01_sfnt_off000065c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 18308 bytes
SHA-256: 72644e025fb680165f16d1b0ea34e097acee0e6e1200ae08e529b95697f37bee

Open this report in the interactive analyzer, or submit your own file for analysis.