Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3acb45614e0eb5…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 17:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b3e58555e2ee34108cea709120941773 SHA-1: cb6e82d94c14d46338e551605bb0942cefee911f SHA-256: cb3acb45614e0eb503de4231d5915034bda10ce4b11480a2bf7d63c50f1f9328
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to websites that claim to offer game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are associated with such lures. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to a site that may host further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/hack-version-of-coin-master-game-hack PDF link annotation
    • http://medinup.pt/images/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00004a0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0E 24524 bytes
SHA-256: a7e54f4840141cb2c171c634181cadff92b98a3c89b703bee43fdfff23776541
font_01_sfnt_off00008222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 17848 bytes
SHA-256: d9bde3e406d035dad20a2676c1f7ae85e4d06f1b9e5d7d6c6a094e48c8d4446c

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