Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c48ad9c5a03f670…

MALICIOUS

PDF

44.0 KB Created: 2021-04-28 12:09:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d25ac5a514bc7944b9a0fb0aa98111bd SHA-1: 0c82905f54ef54c60b705a90235de90a367d450e SHA-256: 9c48ad9c5a03f670f3bf4e27a57bf60a047a738972fd4539d313d24544d1186a
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and references to game hacks and generators, specifically for Roblox. The primary lure is presented as a free download for Roblox Studio, directing users to external URLs. The ML classifier strongly indicated maliciousness, and the presence of numerous suspicious URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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-studio-free-download-for-windows-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/skin-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-no-hacking-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-jailbreak-how-to-get-free-radio-deutsch.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-lua-executor-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cheat-arsenal-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-play-a-game-that-cost-robux-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-those-who-remain-hack-script.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hacks-for-mad-city.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-urban420-network.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-i-got-rthro-packages-for-free.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_off00004614.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4614 28916 bytes
SHA-256: fc40c94a43cc23ed5806735768aa60528c7378d2fb5e6b53bcf114fc06ffc89b
font_01_sfnt_off0000877b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877B 19244 bytes
SHA-256: f7c5704c639135ced6c6bf67db899c40a0fb5b0f5063df399df48cd550245d56

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