Malicious PDF — malware analysis report

Static analysis result for SHA-256 796d3b720cd847d2…

MALICIOUS

PDF

39.4 KB Created: 2021-04-24 18:17:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 99085ff07558546f50cdeae8a780d181 SHA-1: 20455c1a41be5b57f4e54cf145cd39f5ab40a520 SHA-256: 796d3b720cd847d2ba4502cdeee979a46304c064271b822c86c3ceedd1be42fa
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://netcdn.xyz/app/431946152/free-video-files-for-roblox-game-hack PDF link annotation
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/blue-pants-roblox-free.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-limited-button-roblox.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/hack-for-roblox-no-human-verification-2021.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/free-robux-every-ten-seconds.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/roblox-hack-character-skin.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/hack-unlimited-robux.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/roblox-booga-booga-script-hack.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/instant-hack-robux.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-clothes-2021.pdfIn PDF document text
    • http://class.maniclotim.sch.id/__statics/gudangsoal/files/robux-website-no-hack.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_off00003ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ECD 24844 bytes
SHA-256: 4229f93c3ea350428c6eb405781bd56e3b80b2662bc3c43be8e24057b4a0c670
font_01_sfnt_off000077e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E9 18376 bytes
SHA-256: dd42a815f20945cbf007a722ecb7046660fe577358ffafef8935659284621b46

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