Malicious PDF — malware analysis report

Static analysis result for SHA-256 315f6c962c568c0e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 18:49:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5d44d8b7b27b9644dfa340a688529698 SHA-1: 73b483a86fd50d2dd5ec512ab1d3f9e1dfa0447a SHA-256: 315f6c962c568c0e7b14035e46479f0a70686878a649c5f8dd8996808d808b07
82 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks, specifically for Roblox, to entice users to click on an embedded link. The link redirects to 'http://netcdn.co/app/431946152/compte-a-hacker-roblox-game-hack', which is likely a malicious landing page designed to download further payloads or exploit vulnerabilities. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/compte-a-hacker-roblox-game-hack PDF link annotation
    • https://htdvn.com/public/upload/files/roblox-hacks-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-cheat-engine-alternative_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/descargar-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-passtebin_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/groups-that-give-robux-for-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-download-level-dragon-ball-final-stand-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/all-free-offsale-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/rocky-wall-hack-counter-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000033a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A9 22388 bytes
SHA-256: 32d4c59149b226c380c2d4dcdc42f13ad99b035544a5b4b8a664f76260c5222e
font_01_sfnt_off000065bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BB 19196 bytes
SHA-256: e1714682cf8745a9755327f3d1c1f7d7147ea6dfb78f53ea7c5f61ec6149f196