Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb18b200ac8f68f3…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 05:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f7c875b0b7ac436a59bfa339fc207489 SHA-1: 24a471455f820349adc26cce47806cb2d2560a25 SHA-256: bb18b200ac8f68f3ccd591c797a2ffe1bc6630048dab0b2ca32eb7f4a94d2af3
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are SEO-optimized slugs pointing to game-related topics like Roblox and Minecraft. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier flagged the document as malicious. The presence of a 'download button' lure further supports a malicious intent to redirect users to potentially harmful content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/does-roblox-premium-expire-game-hack
    • http://library.yamasi.ac.id//repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdf
    • http://library.yamasi.ac.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/roblox-re_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/minecraft-xbox-free_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/free-arsenal-hacks_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/hack-coin-master-apk-download_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/no-verification-coin-master-hack_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/master-coin-hack-apk_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/can-u-get-free-robux_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000537c.bin
767e79916988ddc0c225fd15cce71ca27e95c808204f509d9c580b74a35dc589		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537C 28320 bytes
font_01_sfnt_off000094f8.bin
d678fd6a1bc8839950e26379efcb538c09795d0b2d64a023aa376d6a81e8ae9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F8 18804 bytes

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