Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f90e08afc8742a9…

MALICIOUS

PDF

44.7 KB Created: 2021-05-12 16:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: de8bb602a2956882d8e23d249a8128f7 SHA-1: 80efedad292968e62bf74b4ddcf9db4726fc27fe SHA-256: 5f90e08afc8742a9c97c8cfb5c96ad6fad1770e7dcd7c435258370e7812fd9a1
90 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, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/479516143/minecraft-java-edition-free-download-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C19 31108 bytes
SHA-256: f6824d526d4f3e9085c8e3cfd779736edabf7e0305f01303d3fe72f9bcfb30b0
font_01_sfnt_off00008b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8D 18572 bytes
SHA-256: be0be2e0bd1478f571662982334261f36152068b9a395b749ff064ff651796b1

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