Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e787cb9810ee688…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 03:48:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc3da2fd10d593f6a9db3b78598af099 SHA-1: c2cc98e8b4cb84deefa6904b7f4f9a86cd0c8cb0 SHA-256: 4e787cb9810ee688db3d59b713cc0be6dd5d96e559032e58613e80406d95dbf7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a redirector hosted on 'netcdn.tw' and other domains, masquerading as game hacks and free currency generators. The primary link, 'http://netcdn.tw/app/406889139/legit-coin-master-hack-october-2021-game-hack', is identified as malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering lure to trick users into visiting potentially harmful sites.

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/legit-coin-master-hack-october-2021-game-hack In PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/moon-tycoon-side-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-freebies-robux-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/cheat-files-download-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-free-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-app_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_off000032ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EC 23172 bytes
SHA-256: 0203671362da437dd3ffe919c5bbe387dd97066a2c5296dbd7fd4965b5c96056
font_01_sfnt_off00006719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 18564 bytes
SHA-256: d2139b6e896fba2bc6825783a40f2adf6174ceefae99483cb33ea8f3a396651d

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