Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3ec8c68cd52e6d…

MALICIOUS

PDF

33.5 KB Created: 2021-07-20 07:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 361f573914e373a3bad7f2875592a298 SHA-1: 96aeb4863961184c076b7d79181b1b6b877fa004 SHA-256: ad3ec8c68cd52e6d9b0ee8c92a4c90ad64f496cd8bd260beafcdfc888e53ae0d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and a direct link to a URL that is flagged as malicious. The document's content and heuristics indicate it is designed to trick users into visiting a potentially harmful website. No scripts were extracted, but the embedded URI and the 'GAME_HACK_REDIRECT_LURE' heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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-gift-card-codes-2021-game-hack PDF link annotation
    • http://www.akvamaster.com.ua/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-robux-generator-for-kids_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_off00002b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B23 22824 bytes
SHA-256: f0030344dc40ab23999c98eb45e1f824b2e4e4667a6cd2e894d5158460e96b1c
font_01_sfnt_off00005de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 19228 bytes
SHA-256: f7aaffab7d527c7e353aaf331618a45d341d70589213c8f53d030cedf69c2433

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