Malicious PDF — malware analysis report

Static analysis result for SHA-256 e646354ee55c3005…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 13:26:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b1fe0666586e472908696a0ea7550204 SHA-1: aa282478ddfd282032c5bdbf8e118375b5443327 SHA-256: e646354ee55c30058f50bfc8aa9167e3371eff1d69bb3bd3c58a91b436bf5158
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple links, with a primary URL pointing to a site offering 'Roblox Accounts For Free With Robux'. The ML classifier strongly indicates maliciousness, and the PDF's structure suggests it's designed to redirect users to potentially malicious content, likely a downloader or exploit, aligning with common phishing and malware distribution tactics.

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.co/app/431946152/roblox-accounts-for-free-with-robux-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/how-to-get-gear-in-roblox-free-admin_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-unused-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-exploit-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-in-3-steps_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-simple_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-how-to-get-free-gamepasses_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-vehicle-simulator-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-superhero-tycoon-free-online_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-daily-spins_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_off00002de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE6 22544 bytes
SHA-256: 1f7891140d5d12746e891a2b868ce0a93eea8ef6b9c8ff040e9417115f45f136
font_01_sfnt_off0000607a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 19376 bytes
SHA-256: f72ba0da379f95a498e751f5d4290c2873b5efcab198e2bc39ba30dad9ef4f0c

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