Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b7d5169fbb633e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-02 05:06:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 325c4bc1f9a0dde746174eeb864fb29a SHA-1: 83c6bc81c992beea36686e3a22c3bf7f00242243 SHA-256: d6b7d5169fbb633e5036cd7e3554ed041e2911ccca065c3b4332b924d4968cd3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are structured as SEO link farms, pointing to pages offering game cheats and free items. The primary URL, http://netcdn.co/app/431946152/free-candy-van-roblox-script-game-hack, suggests a lure for downloading malicious scripts or applications. The ML classifier strongly indicated maliciousness, supporting the interpretation that this document is designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/free-candy-van-roblox-script-game-hack PDF link annotation
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-make-a-cool-free-roblox-acount_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/retail-tycoon-roblox-money-cheat_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-download-free-pc-windows-7_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/get-free-obc-in-roblox-2021_GM431946152.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_off000032c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C3 22296 bytes
SHA-256: 6d97d53faed82a50af1c586a9e86066a0d669d17d53434856a9f0b8cc9135d4f
font_01_sfnt_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 19540 bytes
SHA-256: 851509a4c05e54e1831fd8960a39d0a6fdbba7ad848c199a3714902af4cbb3fb

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