Malicious PDF — malware analysis report

Static analysis result for SHA-256 346f38f606457fd6…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 15:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a27901ded499e43273f7d9048769174 SHA-1: 07fef797bb95c2e1b05d178932af457a45b3daf8 SHA-256: 346f38f606457fd66d6d7717b2aef906c2570f561ec1bbbd0eeefbd49d5c5aca
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to appear as legitimate resources for game hacks and in-game currency. The primary URL, http://netcdn.tw/app/479516143/tiktok-minecraft-hacks-game-hack, likely serves as a landing page for a malicious download or exploit. The heuristic firings indicate a high likelihood of malicious intent, with the ML classifier strongly flagging the PDF.

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/479516143/tiktok-minecraft-hacks-game-hack
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/today-free-spin-coin-master_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-hack-phantom-forces-roblox_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/roblox-catalog-free_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-apk-hack-358_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/robux-free-c_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-tv-series-roblox-shirt_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/i-killed-a-man-meme-hacke-d-a-roblox-server_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-with-lucky-patcher_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-link_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-fb-free-spins-link_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-roblox-valentines-cards_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/roblox-generator-no-human-verification_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/win-free-robux_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-card-collection-hack_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/rich-free-roblox-accounts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003334.bin
571bbbb3fc080dc96c3dcf4b2cd9d57d59844b4a913ce9f5fd434cb83c61be20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3334 22252 bytes
font_01_sfnt_off0000645b.bin
49b148a5ca756e3f3293ae7356a748e2214796aae6d20bfd78280b7e22c0c315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 18168 bytes

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