Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bda97ed4c3b28e1…

MALICIOUS

PDF

36.0 KB Created: 2021-06-26 23:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bf1f7bb20dcdea4071ebaece6e039ed2 SHA-1: 0b8794da59e1b2a80ade9f01850315cf800522e3 SHA-256: 1bda97ed4c3b28e1c8f0acadb8d49c8e925d99ef241a2fcf6b87d24964764185
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, likely to direct users to download malware or engage in scams. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure.

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.co/app/431946152/roblox-jailbreak-speed-hack-download-game-hack
    • http://www.nguyentraiedu.vn/cms/public/upload/files/robux-free-hack-no-survey-2021_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-phantom-forces-pepsis-aimbot-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-prison-life-how-to-hacks-jjsploi_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-hack-no-verification-no-signup_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/hack-dinero-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/hack-jailbreak-roblox-2021-pay_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-vip-hack-fashion_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-pastbin-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/robux-adder-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/android-1-com-roblox-hack_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/easy-cheat-for-ultimate-driving-newark-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-hack-robux-1_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/did-my-roblox-get-hacked_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-free-stuff-on-roblox-on-ipad_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/mega-cheat-download-in-roblox_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/como-ser-hacker-en-roblox-meepcity_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-roblox-groups-with-funds-list_GM431946152.pdf
    • http://www.nguyentraiedu.vn/cms/public/upload/files/free-robux-android-2021-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033e3.bin
56c8b2aa4733354d7fe8e8b2b538696943125a434ed000309ce4b176d67bf1fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33E3 22416 bytes
font_01_sfnt_off000065f6.bin
2b429945090be17018c8401ad165c7f816f8600a77ffafc46c8ea782d0d6bf0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 19624 bytes

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