Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90a569154be72fc…

MALICIOUS

PDF

42.7 KB Created: 2021-04-27 08:06:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bfbe2dd917556f3163b917e932068aaa SHA-1: d153d6fb1e42bf2fb20cc6da8178b0b1077c64d4 SHA-256: f90a569154be72fc6b78c21b4e5bdac961e1fddce0fddbd9ce06d4a2fc1f17c2
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to potentially malicious PDF files further supports a malicious intent. The primary malicious URL identified is https://netcdn.xyz/app/431946152/infinity-rpg-hack-roblox-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/infinity-rpg-hack-roblox-game-hack PDF link annotation
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/get-free-robux-easy-and-fast.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/free-robux-glitch-code.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/focus-points-hack-roblox-dybo.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/roblox-jailbreak-mobile-cheat.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/roblox-mad-city-free-vip.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/roblox-anime-tycoon-hack.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/how-to-hack-bedwars-2-on-roblox.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id/repository/crazy-lion-free-robux.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/free-roblox-gift-cards-live.pdfIn PDF document text
    • http://www.perpustakaan.smansa-bdl.sch.id//repository/robux-cheat-websites.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_off00004158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4158 28576 bytes
SHA-256: f01c5bc2268b8a1390ba9c28aaa90a4eb99f24a4b97b8caff570393d145f4731
font_01_sfnt_off000082b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 19048 bytes
SHA-256: 55bd17ab53eee1fcd70c52376c835dfd2d2376fc75d7f8f877fc0c0f2b44db1b

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