Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e28082d48dbac2…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 07:45:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 329b99148cfac422193e66934e825b68 SHA-1: 85440121a6c204f358e7672e2759e42d60ba8191 SHA-256: e6e28082d48dbac2cb3f9e87a2b19f4537933f0e26801eb3a59cebd401e015bf
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to external sites for downloading content. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent, likely to deliver a secondary payload or facilitate further compromise. The document body and extracted URLs focus on game-related cheats and hacks, a common lure for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/431946152/free-shirt-roblox-pastebin-game-hack
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-reddit_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-phantom-forces-uncopylocked-all-guns-free_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/hack-the-coin-master_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-hugs-trailer-movie-oblivioushd-roblox_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/minecraft-java-edition-key-free_GM479516143.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/best-free-avatar-on-roblox_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-roblox-accounts-passwords_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/blogger-free-spins-and-coins_GM406889139.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-instantly-no-cache-legit_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/donde-entrar-para-ser-hacker-en-roblox_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-build-a-boat-for-treasure-hack-script_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/minecraft-client_GM479516143.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-roblox-card-codes-2021-not-used_GM431946152.pdf
    • https://elearning10.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-hack-on-phone-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_off000036c2.bin
031ab74b62113989c4baf22c11e69b12f7c4b9b87053f3b634400abcb4603376		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36C2 22764 bytes
font_01_sfnt_off000069b4.bin
b255794bb0de320a3bb85b7727486bf923b58cfbe62b44e7af8ad31632dfe27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 19196 bytes

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