Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1914b2c653536c9…

MALICIOUS

PDF

36.2 KB Created: 2021-06-27 20:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 34e0021e91134f9cc1fc48db8659a77d SHA-1: 71a8d3e9cd119aecccb422b47e9b2d1d7605f054 SHA-256: d1914b2c653536c9b4ac52430f1e027297f000aacbf60c6229b007d80afbdc20
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as downloadable PDFs related to game hacks and free in-game currency. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-november-2021-game-hack, suggests a lure for obtaining free Robux, a common tactic for distributing malware. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to trick users into downloading harmful content.

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/how-to-get-free-robux-november-2021-game-hack
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/roblox-cheat-engine-speed-hack-2021_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/get-free-coin-master-coins_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/minecraft-free-version_GM479516143.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-bypass-survey_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/kohls-admin-hopuse-hacks-roblox_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/how-to-do-attack-speed-hack-roblox-2021-feb_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/get-free-robux-proof-2021_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/easiest-money-hack-february-roblox-rocitizens_GM431946152.pdf
    • https://metropolemoveis.com.br/ckfinder/userfiles/files/free-magical-chest-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003302.bin
1785a5f162c63b9c527e5d686ca68121703d9155a0ab7120d2c9db40c976b18f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3302 22924 bytes
font_01_sfnt_off0000665f.bin
0c51c6aa03b7e7febfd109d1b03b6c1e3238ba8e47eebb729a27a19dabcfa5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 19760 bytes

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