Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b95b82c4047fd11…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 22:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8d4b88b7ad0184d6c4341f592c27584 SHA-1: f18952a5281e3226b6c5afef21efc38b85006717 SHA-256: 0b95b82c4047fd11480c5f99a685f0022addbd30fd2c10fa4d293b90a7478d61
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are related to game cheats and free items, suggesting a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. The primary URL http://netcdn.tw/app/479516143/minecraft-launcher-free-game-hack is likely the initial payload delivery point.

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/minecraft-launcher-free-game-hack
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-paintball-cheat-codes_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/free-dominus-hat-in-roblox_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/haktuts-coin-master-spins_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/hack-coin-master-iphone_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-shoulder-friend_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-mobile-hack-tool-download_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-candy-van-script-pastebin_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/new-free-items-in-roblox-catalog-2021_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/roblox-find-the-domos-hacks_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/trigon-cheat-roblox_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/minecraft-mod-menu-apk_GM479516143.pdf
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://daskrimti-jabar.web.id/library/repository/emergency-response-liberty-county-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b5.bin
40d9c19fca16ff097cb1c4feca473f2c8d001eb0678c9cea85a72a6f4f7a1a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32B5 21536 bytes
font_01_sfnt_off00006210.bin
6217c2688e2cdd9b922ed2b0e9f3b2fc7a8795a9dac31b3127849cac571971e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 18164 bytes

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