Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7147375fd024abf…

MALICIOUS

PDF

40.3 KB Created: 2021-04-23 10:15:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27fc67f09b7a61ee2db4660f792f21b8 SHA-1: d374d0020118a079ec3dda608cd0cfaee2d1e181 SHA-256: b7147375fd024abf0c3368c48aaef00ce8177cfc05220a1dde715333aa881253
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 0.9941

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://netsecure.top/app/431946152/how-to-make-a-private-server-for-free-on-roblox-game-hack PDF link annotation
    • http://blueduna.com/images/free-roblox-high-school.pdfIn PDF document text
    • http://blueduna.com/images/roblox-cruise-ship-tyccon-albatros-free.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-stuff-that-cost-robux-for-free.pdfIn PDF document text
    • http://blueduna.com/images/how-i-get-robux-free.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-generator-google-chrome-plugin.pdfIn PDF document text
    • http://blueduna.com/images/guest-roblox-face-hack.pdfIn PDF document text
    • http://blueduna.com/images/how-to-give-robux-to-freiends-for-free.pdfIn PDF document text
    • http://blueduna.com/images/survivor-hack-scrip-t-roblox.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-admin-commands-on-roblox-for-free.pdfIn PDF document text
    • http://blueduna.com/images/obby-gives-you-free-robux-no-password-required-2021-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_off00003f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F97 25868 bytes
SHA-256: d3886b96e0cd290d492290d6623eb0824a2765a9a46604f913ffcd5a128a822b
font_01_sfnt_off0000792e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792E 19196 bytes
SHA-256: e242f2087695c366c4a8c54bd45335ecac37f304f81b16e0b386bb6419cfdbd1

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