Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0881cb40bfab4e…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 08:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4ef6ae501c424fd990d3f4640a4fc9ec SHA-1: 55741d2d533344c5ba54be4fcdd8c170ae447789 SHA-256: 4f0881cb40bfab4e79ee2c93933dda0fc09eae9bfb2bec5c3a226b962fef45f1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to websites offering game hacks and free currency, such as 'roblox-free-robux-website-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of these lures indicates an attempt to trick users into visiting potentially harmful sites. The document's structure and embedded links suggest it is designed to facilitate initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-free-robux-website-game-hack PDF link annotation
    • http://oca.undil.tl/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-mod_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
stream_003_off000049ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EA 25836 bytes
SHA-256: 18ac895ecd14ee2c45d0861af600d7f3af7f756789cd4d450e34422afd8f3b72
font_01_sfnt_off00008536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8536 18508 bytes
SHA-256: fbcd203c7e924a0ebec4ef4aa0eb55ec8b14d1abcc2767c4f5d3ad1ccc86f8e3

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