Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d452b65f699cd48…

MALICIOUS

PDF

38.2 KB Created: 2021-07-09 11:22:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4d236a7babc873dfa723a338fd51f2e8 SHA-1: a2439510e9ee6434bf445ae4a282ae9bf601fb92 SHA-256: 6d452b65f699cd48b33cc0865fe8955fa0be6326e3770c1f10c6510747ed6224
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which are SEO-optimized and point to game-related hacks or cheats, suggesting a lure for potentially unwanted or malicious downloads. The presence of a 'download button' heuristic further supports this, indicating a social engineering attempt to trick users into clicking malicious links. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/coin-master-hack-spin-160-pro-game-hack
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-google-play-free-things_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-games-that-work-2021_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-exchange-40-free-spins_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/business-cat-roblox-for-free_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-roblox-boy-hair_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/hacking-words-for-roblox_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-daily-coin-master-coins_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-apk-online_GM406889139.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-lawsuit_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-protect-against-hacks-in-roblox_GM431946152.pdf
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/pastebin-free-robux-working_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003c9c.bin
957eaa24efa4339e5cb68c4801f88198bfe5c31fc4a41ec563f87df87c4214d7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C9C 23440 bytes
font_01_sfnt_off0000713f.bin
af4936e3ccb6416df15e8de664b166a9aa200208572627e4f7bda013e34b6fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 18780 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.