Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5060bfd63c6004e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 03:21:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 36d600b187cc49e44eac3d322c372ffe SHA-1: 1a1b388b7f052665b08fe05f46ba0b32a32efe22 SHA-256: f5060bfd63c6004e17117d086285be8f39d4f21ea271e43944e9981ae1b7a09c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a specific URL in its body, all related to obtaining free in-game currency or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via link farms.

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/coin-master-free-spins-link-2021-today-game-hack
    • https://abellamoveis.com.br/ckfinder/userfiles/files/commen-avoir-robux-free_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-hacks-on-roblox-mobile_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/heroes-online-roblox_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-speed-hacks-in-roblox_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-hack-into-someones-account-in-roblox-2021_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/robux-redeem-card-free_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-do-i-get-robux-on-roblox_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/minecraft-free-download-unblocked_GM479516143.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-recover-a-hacked-roblox-account_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-zombie-strike-hack-script_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-hack-any-pokemon-into-project-pokemon-roblox_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-hack-roblox-infinite-robux_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/roblox-avatar-for-hackers_GM431946152.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://abellamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-100-real-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d5.bin
d2e50ebfb207095ea60f51e853688a90e95be6ac093b0f356ed986081dc901b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31D5 22096 bytes
font_01_sfnt_off000062d0.bin
de35a114d8e8c4fc4d70d52a756b20ceb128d757b6ef9e01fa5e276a673837de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 19100 bytes

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