Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3c69e8d4c37c1c…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 20:21:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3f66599d2428e232d5c2b751ab6c3821 SHA-1: ee385e00f2b68126afe7088257b76b823c1464cf SHA-256: 3d3c69e8d4c37c1cc5d884ec0af48278545ed6e59382866ffca44a25aa581568
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure the user into clicking on a URL promising free game currency or hacks. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack, is a known redirector for malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

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/431946152/how-to-get-free-robux-fast-and-easy-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-empty-roblox-alt-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-any-username-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-anything-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hole-in-the-wall-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-cod-style-games-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-if-you-join-my-group_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-cheat-in-roblox-eep-city-starball_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-exploits_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-2021-october_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/google-how-can-you-get-free-robux_GM431946152.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_off00002cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB1 22092 bytes
SHA-256: a63eeb782af7725826c311c215f62061d8d605cb82636a7cf3022b4cbd5d9176
font_01_sfnt_off00005d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8E 19340 bytes
SHA-256: e9e0cf1ab6f783e57183aba6e7ab34e8b0edef29a09b47d1de428d0435b690df

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