Malicious PDF — malware analysis report

Static analysis result for SHA-256 4256da798cd5a93b…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 02:32:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2845728ae659f0492f8cab94bd45f98 SHA-1: a90299e6ba87fe6bb56e14345c9099a91985e5b3 SHA-256: 4256da798cd5a93b8893092011c79631936863080c380fd1ddae780ad9586198
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering "Coin Master" cheats or hacks. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-coins-app-game-hack, suggests a lure for downloading a malicious application disguised as a game hack. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/coin-master-free-coins-app-game-hack
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-app-ios-download_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-coins-for-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/moonactive-free-spins-link_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/coins-master-hack_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/can-you-earn-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-mster-free_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-online-games_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/robuxfree-con_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/robux-hack-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004845.bin
607df448b9dbaa600d63433ed5dedc28279a5abb14784a01e085d1bfabca3d77		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4845 24892 bytes
font_01_sfnt_off000081fa.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 2840 bytes
font_02_sfnt_off00008bac.bin
3acccbbe7a83c149c22979297be8e0f2d1fa2551ed3d228e44848c7e1eaf2a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAC 17884 bytes

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