Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e9fa9a2bd3de11…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 12:23:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 27504a197e2d1d6e60afce5469e7d486 SHA-1: 038c482e19aca7dd987bc39eb7b329ca4436978f SHA-256: 85e9fa9a2bd3de1134fb6ca26e5e44578daba3acbbd5c20333d520724811e137
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which appear to be related to game hacks, suggesting a lure for users to download potentially malicious software. The presence of a 'download button' heuristic further supports this, indicating a deceptive call-to-action. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/descargar-coin-master-hackeado-game-hack
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-minecraft_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/113-hacked-client_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/sb-game-hacker-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coin-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-spins-free_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-only_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/hack-game-plus-com-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-block-someone-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-game-hack-version-download_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/can-i-get-robux-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/rbl-gg-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spin-coin-master-instagram_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-op-minecraft-servers_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000502b.bin
00c37691ec24de3d7e864490e6dda741a77e510d7cc1016bb8723597a33d331c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x502B 24244 bytes
font_01_sfnt_off0000869e.bin
f36247ffb38554f38145ddbd5964f7161795fb102c5bcaad17a29f5e2fd4ae9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869E 18344 bytes

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