Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6862fd76ca591a0…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 07:34:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cd85959ffdda9cc328ddc3e10c585d9c SHA-1: 21b1a92272f6ed064e802159f3708932a835eb86 SHA-256: c6862fd76ca591a0d8a10cca381be11b3d7580f6b8de2be028b1212e788e47c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector infrastructure. The document body explicitly contains the URL 'http://netcdn.tw/app/406889139/coin-master-no-download-app-but-play-for-free-game-hack', which is also listed as an embedded URL. This suggests the primary purpose is to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-no-download-app-but-play-for-free-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-give-free-account_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/game-garudian-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-in-roblox-murderer-mystery-2_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hack-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-cheat-engine-bypass-october-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.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_off000032f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F4 22596 bytes
SHA-256: 91e71a9a52c1caed0339f88d109f86c29e236a7d957ca62ea5e7c7e7b0adffc5
font_01_sfnt_off00006549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6549 19444 bytes
SHA-256: ea47f9531116b16f57de1d803187e6efddda05d2630fe094ad28dda41a7c825b

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