Malicious PDF — malware analysis report

Static analysis result for SHA-256 545186a4493bb556…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 08:46:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 621ac7327d59f7bfde6588471775ff0f SHA-1: 43543220126a550364de33c3b402de18e8776436 SHA-256: 545186a4493bb5569543da8e6d40b522561ad6089a65027019d98a1102ff2233
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, specifically 'Coin Master', directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded link likely leads to a site designed to exploit user interest in game cheats, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/can-you-really-hack-coin-master-ios-game-hack PDF link annotation
    • https://naturenz.vn/public/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/getrobux-info_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/roblox-earn_GM431946152.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_004_off00005154.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5154 24972 bytes
SHA-256: bb07e83f9f9ee95ec8a07331b9bc3f40d29cd8fd7a47341b71e48f241f6fb796
font_01_sfnt_off00008a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 18272 bytes
SHA-256: d6dbfa26c4735c509ef21bc2fb5cbfc43e5651c474b450515f522a35f82f0c88

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