Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b9bb765b4e390a…

MALICIOUS

PDF

50.8 KB Created: 2021-06-03 17:10:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 375c4fdce8b6c9525b2f05a6a39ff36e SHA-1: 90354b5e0fba8cedcf9cc443e237ae9f927e900d SHA-256: 04b9bb765b4e390a5bfbffc8f934d6acb814a2c6fe78da68cef0847f0eebf1a9
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 game hack redirector, specifically mentioning 'Coin Master Free Spins'. The embedded URLs further support this, pointing to various game-related hack pages. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to drive users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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/coin-master-free-spins-link-today-facebook-game-hack PDF link annotation
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-cp_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-get-tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005289.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5289 26484 bytes
SHA-256: 1355a7df0a88ef513702c57df7fe1998340676217d3cbd71fec01c6626060f33
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000a2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F9 18568 bytes
SHA-256: 976bad0f84eadf36fe6397f68da5c043a767fda9c526d6325df07f5c92c7ef85

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