Malicious PDF — malware analysis report

Static analysis result for SHA-256 274a889300586505…

MALICIOUS

PDF

41.7 KB Created: 2021-04-30 04:47:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f581728dbc60269e956756f5f702be4 SHA-1: 2779655b7916baa3dafeec21fbd993501c3a3094 SHA-256: 274a8893005865054a2347e119eb817f38ab2511cabe30cfa5efb9edcc0813ea
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs social engineering tactics by impersonating brands and offering game hacks to lure users into clicking malicious links. The primary link, 'https://netcdn.xyz/app/431946152/bubbatron11-roblox-hacker-game-hack', is associated with a browser extension installation lure and a game hack redirect. While no scripts were directly extracted, the PDF structure and embedded links suggest a workflow designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/bubbatron11-roblox-hacker-game-hack.
  • 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/bubbatron11-roblox-hacker-game-hack PDF link annotation
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-skin-roblox-men.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-roblox-new-hood.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-dll-hack-windows-7.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-hacks-ohne-handynummer.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-report-hacker.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-admin-roblox-map.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-get-free-faces-on-roblox-no-download.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-scp-foundation-model-free.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-make-a-free-robux-hack.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-get-free-godly-knives-on-assassin-roblox-2021.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_off000044b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44B9 26316 bytes
SHA-256: 6c7ba0141eb47bb3b12f8877383dbb4adec34ace4f07e390c11f9f7a3417bb3d
font_01_sfnt_off0000806b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 18532 bytes
SHA-256: b089fe80e7cc955a32b137cef09e0be940ba30623eeca18849f0d87aa841b611

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