Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf167f57283f8203…

MALICIOUS

PDF

40.0 KB Created: 2021-04-30 22:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: be46e00f70abdb521628605ba205ad1a SHA-1: d978fd49e0c81f3f97d438aa93d25b16ed196b89 SHA-256: cf167f57283f8203c2a5de2dad61700b54d5ac3a56bfc9bc63881d7827a9bc94
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links and a call-to-action button, directing users to websites offering 'Roblox hacks' or generators. This social engineering tactic is commonly used to trick users into downloading malicious software or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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
  • 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/hack-pacifico-2-roblox-game-hack PDF link annotation
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-roblox-hackeado-para-pc.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-cheats-client.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-skywars-hack.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-roblox-music-id.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/how-to-hack-on-xbox-one-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-free-robox-dite.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/noclip-roblox-hack.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-roblox-hackeado-adopt-me-para-pc.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/como-hacer-hacks-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/cheating-in-boku-no-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
stream_003_off00003e1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E1B 25616 bytes
SHA-256: 0a8bc93f63a4efd44e91d0b2cdb4534e565cfca7cb39bfed199673150b6351cc
font_01_sfnt_off000079a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 18580 bytes
SHA-256: c24fe2deb2ad30d9a4302715269c73bf88b54b901c47092d382fb2597f58e3c4

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