Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee38d57fe74db176…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 02:57:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d1c87d3c6b0ef770134cd458f196b673 SHA-1: 52396cc8bac5970836a519487d65d12c9069ee8e SHA-256: ee38d57fe74db176f8e2177af127855d72398efc569299236422864abaa96fc9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm or a distribution point for potentially unwanted or malicious files. The document body itself contains references to these lures and embedded URLs.

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/freespinandcoin-game-hack
    • http://pustaka1.unindra.id/repository/minecraft-windows-10-edition-hacks_GM479516143.pdf
    • http://pustaka1.unindra.id/repository/roblox-robeats-cheat_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/coin-master-cards-free-cards_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/free-robux-human-verification_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://pustaka1.unindra.id/repository/xray-mod-minecraft-114_GM479516143.pdf
    • http://pustaka1.unindra.id/repository/how-to-hack-accoutns-on-roblox_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/easy-way-to-get-free-robux_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/roblox-restaurant-tycoon-hack-luac_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/free-robux-generator-no-survey_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/free-robux-generator-no-verification_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/can-i-get-free-robux_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://pustaka1.unindra.id/repository/hwo-to-create-a-roblox-game-for-free_GM431946152.pdf
    • http://pustaka1.unindra.id/repository/rbxoffer-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d4.bin
7f54d06ea0dd0077aad29fb46521f314ae0220efc92c4ee134bbde0dda1a64af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31D4 22788 bytes
font_01_sfnt_off000064af.bin
19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 18244 bytes

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