Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c0a2c8e6d6d733…

MALICIOUS

PDF

37.9 KB Created: 2021-04-28 18:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1db612e15df210afacef19abb0a8513 SHA-1: f25168b381954ab273e35bd7c38ff1683bcf4bad SHA-256: 19c0a2c8e6d6d733053ce1c01bba34cf0d273e8e6a0bd6f7720363710db4a97d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9474

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/gg-hack-client-roblox-game-hack PDF link annotation
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/how-to-get-free-tickets-and-robux-on-roblox.pdfIn PDF document text
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/vip-roblox-hack.pdfIn PDF document text
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/get-free-group-roblox.pdfIn PDF document text
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/robux-win-redeem-code-hack.pdfIn PDF document text
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/free-robux-pointsprizescom.pdfIn PDF document text
    • https://rafaellucenaehijos.com/ckfinder/userfiles/files/how-to-wear-free-faces-on-roblox.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_off0000388f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x388F 24700 bytes
SHA-256: 035e4dae80e1a776d5e9a54f9907d481651e19df38e1d3f207ac4d69a1683937
font_01_sfnt_off0000712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 18692 bytes
SHA-256: 81e2117b07c75e7b0b799463144e3d40ef5f4dc88e93fd84fa8ef861b66ac280

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