Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdab6d84d67ae578…

MALICIOUS

PDF

41.3 KB Created: 2021-04-27 08:54:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c67241289a9f380db0de385eeddcc44f SHA-1: 5cb8b5ec1436e0cc772315f6c4d8312124159989 SHA-256: cdab6d84d67ae578788c7c0bae023b11b9571672edfd8474c0a011cdcc596dd0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'free generator / game hack' which is a common lure for malicious sites. The document body, though partially corrupted, also contains references to Roblox hacks and a URL that appears to be a landing page for such content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/bhop-hack-roblox-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/descargar-roblox-hackeado-adopt-me-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-is-being-hacked.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cool-tshirts-for-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-free-logiciel.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hacks-to-get-free-robux-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-legit-with-proof.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-place-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/redeem-promo-codes-for-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-speed-race-hacks-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-logo-hack.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_off0000425b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x425B 27112 bytes
SHA-256: 020bc1c4048c41d75b00d4aafb76e8839960b4aa2e498fbe257da40495d39943
font_01_sfnt_off00007f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F15 18524 bytes
SHA-256: f39761b030e95402d84dfaf03b6bbf9cd30e68c3a92fef50c8d675e53c1e4aca

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