Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc59831f1db260a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 07:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 080a44f59285955f965caf233e5217ed SHA-1: a9620e0c4812f92c68124b196df24379aff920c3 SHA-256: fdc59831f1db260aae10058ac9c17946a90f4f315f586c05bdc2bacab8349792
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure of 'free Robux' and game hacks to entice users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-no-verification-game-hack, is flagged as a redirector, suggesting it leads to further malicious sites or scams. The ML classifier strongly indicates maliciousness, and the overall pattern points to a phishing or scam attempt designed to lead users to potentially harmful external content.

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/free-robux-no-verification-game-hack PDF link annotation
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-free-pet-in-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-cheat-in-roblox-welcome-to-farmland_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/code-code-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-free-daiblo-in-ultimate-drive-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/zombie-illuminati-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-gear-in-roblox-free-admin_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/sonic-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-1m-free-robux-everyday_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/best-free-non-virus-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://pustaka.mesin.ft.unand.ac.id/repository/hacks-for-roblox-prison-life-v2-02_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
font_00_sfnt_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22732 bytes
SHA-256: 12b0df14312ffa8c361490c60987072960e8e681270ddaf214d670698a5ec438
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 19072 bytes
SHA-256: ace71d10471f941b47a74757ee9bffc2eb087028e16fd0b67ae59ecc13578840

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