Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8248973a9defbaa…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 12:49:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 70cf41bb95fb2271d3077cddf87c2141 SHA-1: 69e97756957d28626d32465b30557aaeb8f59a19 SHA-256: c8248973a9defbaa4d0307a5f362178d1d4a1b44b8e5d7a3de754087f659df46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The primary URL, http://netcdn.tw/app/406889139/spin-and-coin-game-hack, is presented as the main lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a potentially malicious site, likely for malware download or credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/spin-and-coin-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/thinking-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-shirt-roblox-boy_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-murder-mystery-codes-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/i-want-to-break-free-roblox-music-code_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-create-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-how-to-get-unbanned-with-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-jailbreak-how-to-get-free-radio-deutsch_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-trial-no-download_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-local-player-script-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/esp-hack-roblox-pastevin_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-coin-master-2021-espaol_GM406889139.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_off000033f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F4 22992 bytes
SHA-256: bf246e8b181802d50795fd4eae41d8ef6c769a028c741c423ed200db72530fbe
font_01_sfnt_off000067ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AC 18080 bytes
SHA-256: 012df21d0068cf60c223a53958773a0d059661452b676895ba6a235f4df9029a

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