Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac251457276cce96…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 03:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3090b368cf701dcb22229fbd8321d4e6 SHA-1: c24ee4eb18f1a9ba881f3be1434c60e588e1b13d SHA-256: ac251457276cce9670934d1b801f0e6fa763200be581bab3f49aba4631fedc17
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to game-related cheats and hacks. The primary URL http://netcdn.co/app/431946152/wie-kann-man-in-roblox-hacken-game-hack likely serves as a lure to download a second-stage payload. The heuristic findings indicate a link farm designed to attract users searching for game exploits.

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/wie-kann-man-in-roblox-hacken-game-hack
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/robux-hack-no-verification_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-spin-link-free_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/roblox-bloxburg-hack_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/is-pubg-uc-worth-it_GM1330123889.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/minecraft-pe-mod-menu_GM479516143.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdf
    • https://www.johnofrolleston.com/admin/ckfinder/userfiles/files/best-free-spins-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313f.bin
bc330ce116e9efe72fc31b3aab16e3a4d7f36a500f9d011801e160a138d907cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x313F 22076 bytes
font_01_sfnt_off000061cf.bin
89c81338ba41dd58c92d076c1fde2d3bf415c8a168a013e8f2c53695355d01a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CF 18984 bytes

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