Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ebb19250640549c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 15:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8b70d4b5d96d44de94f0acc9c236a5ce SHA-1: 52f06dc65257210fd094a26c733fac9d77077b27 SHA-256: 1ebb19250640549c8040f7fcb3b0dc4a31234e8dee1f03f7f52ed464f9c2f03f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized "link farms" related to game cheats and freebies. The primary URL, http://netcdn.tw/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack, suggests a lure for users seeking in-game advantages. The presence of a large number of external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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.tw/app/406889139/where-can-i-get-free-spins-for-coin-master-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-r-free_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/juego-hackeado-de-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/gift-cards-for-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-8-robux-free_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-hack-add_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spins-23-march-2021_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-builders-club-free-robux_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/is-roblox-free-on-three_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/new-roblox-free-faces_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-online-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-shirt-templates-for-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-games-online-free-no-download_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-coins_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/is-java-minecraft-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003263.bin
cd747e1e8614ae8c8600a3da6f2c630910375d92e91f30fdea8122d6bed046ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3263 22460 bytes
font_01_sfnt_off0000640c.bin
b12aa12d38c8c524e7797586759798b9ea71944b9981e44aaeae315634813687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 18540 bytes

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