Malicious PDF — malware analysis report

Static analysis result for SHA-256 591b59dfcce2af40…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 09:14:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5c4236d83b1d66c4ff3feb2381ef79d SHA-1: f1edfc42151eacfb81c3425ac2627300c392bccf SHA-256: 591b59dfcce2af40c96a2493ac6569c1826fde02c5fc3bd1bc557a90b3f9f137
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to pages offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a malicious site or download further content. The document body, though partially corrupted, contains text related to downloading hacks for Roblox, 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/descargar-hacks-para-roblox-pc-game-hack
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-hack-without-root_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/como-hackear-una-cuenta-de-roblox-a-alguien_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/become-a-hacker-in-roblox_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/get-action-hair-free-roblox_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/minecraft-free_GM479516143.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/how-to-hack-passwords-on-roblox_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/mobihack-roblox-hack_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-hack-no-verification-ios_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-inspect-roblox_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/comment-trouver-un-bon-hack-pour-roblox_GM431946152.pdf
    • http://www.samsoncc.com/uploaded_files/userfiles/files/robloxfun-com-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ab.bin
9dcec7e4af767d5c288c3b5d20d08a23433451a4276fd673f45a947bf091eb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AB 22744 bytes
font_01_sfnt_off00006664.bin
f2390a288712422b6b1734fcb6552e5767a4a34bc68437141bb77c58887b9665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 18980 bytes

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