Malicious PDF — malware analysis report

Static analysis result for SHA-256 8225527b38a092b7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 12:47:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b24c856e9eeb410c311b5aaab4bd48e5 SHA-1: 98d8b75db925c55468544e1c94bbd10ccada9550 SHA-256: 8225527b38a092b79962b3a05b77464880c4fb051b703547e70c39d114728ceb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs offering game hacks and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. The document's primary purpose appears to be directing users to these external resources, likely to distribute malware or engage in phishing.

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/pokemon-card-free-robux-game-hack
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/robux-hack-2021-android_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/redeem-roblox-item-free-codes-2021_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/coin-master-rewards_GM406889139.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/rbx-free-robux_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-not-clickbait_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/roblox-xbox-one-free-packages_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/minecraft-xbox-360-free_GM479516143.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-do-you-get-robux_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/apps-that-actually-give-you-free-robux_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/minecraft-survival-hacks_GM479516143.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://www.kesambibaru.com/new/public/ckfinder/userfiles/files/pastebin-robux-hack-911_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003121.bin
3d5bff70c17920706daa513d225f169218538694c035c9c8d6d30100251b9914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3121 21856 bytes
font_01_sfnt_off00006133.bin
3fae0218c5894a0023baecf88c73490529187e50c28bd95eafca3e2226256aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 19476 bytes

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