Malicious PDF — malware analysis report

Static analysis result for SHA-256 f432e3334b7da066…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 20:10:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0dde8a2bc6827c978122d0a7b79a7308 SHA-1: 5717e505bff60f343946c43181cfaba5c64ece33 SHA-256: f432e3334b7da0668216cf367e574b971bb6c57beee06dde46f08a7d1d934917
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-with-no-verification-game-hack. This URL is highly suspicious and likely leads to a malicious site for credential harvesting or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/free-robux-with-no-verification-game-hack PDF link annotation
    • https://www.gornjastubica.hr/files/free-robux-gift-card-uk_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-protect-speed-hacking-from-games-roblox_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-como-hackear-una-animacion-para-tenerla-gratis_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/noclip-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-free-candy-song_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/real-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-are-roblox-cheaters-cheating_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/roblox-old-version-free-download_GM431946152.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_off00002ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE8 21900 bytes
SHA-256: a7f79a76e35715648b74eac2a03cd280555533c32430ac8157a7efa8345001b7
font_01_sfnt_off00005efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFA 19436 bytes
SHA-256: 152779ac3709d5a43144f85cc286cfc78713a2961a87782e1bc06cce99e4fdaa

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