Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ede0db31c994dc5…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 07:27:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: def65ba762b4e5bc6c61f5bb5b8be623 SHA-1: be8ba89fa06830d5630be9e99877d1a3ae7b9538 SHA-256: 6ede0db31c994dc5f4c1dfd487c852195828e02eb717bcac590e3acfac585535
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external sites, many of which are SEO-optimized pages offering game cheats and rewards. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a deceptive call to action. The primary URL http://netcdn.co/app/431946152/free-robux-rewards-site-game-hack likely serves as a landing page or download source for a secondary payload.

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-robux-rewards-site-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-items-on-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-roblox-accounts-2021-mac_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-for-android_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-executors-for-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/pokemon-go-free-shiny-celebi_GM1094591345.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-on-computer-free_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-vip-server-on-roblox-jailbreak_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-robux-generator-for-kids_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hacks-for-boku-no-legacy-alpha-2xexp-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/mcpe-116_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-phantom-forces-roblox-lvl-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-cheat-engine-hack_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032cb.bin
4c1ce04a8a193089a2f8c2a8215b75e7989eb897e8f66d962bf3ebf1c6a6fb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32CB 22344 bytes
font_01_sfnt_off00006417.bin
51d9ea3253511a3a8d6e2aa7c6a4a6ab12db51c0f6e7cf42f506a4198a4894a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6417 19280 bytes

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