Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc706dbb15e403ba…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 20:53:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4f98693ffb549db006eb02540d0dce42 SHA-1: cd9dadc59aa11b81c966a7292b9c30ef5172c402 SHA-256: dc706dbb15e403ba1d4a210a21a19d1a221e854d57c2a8eb41e0426c9d574604
82 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/479516143/minecraft-bedrock-download-pc-free-game-hack PDF link annotation
    • https://kojak-group.com/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-hack-tool_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_off0000510d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510D 25312 bytes
SHA-256: 036a05f41f86d5733a94e7c2fbaa103643f35daab38f8bb172109af367d79f74
font_01_sfnt_off00008a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A06 18828 bytes
SHA-256: a264e86136786ea36ffe75565c0a75df0f10437a5612c71f93040c03370f29a0

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