Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a32e71a8a28d4f…

MALICIOUS

PDF

35.3 KB Created: 2021-06-22 03:49:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 422e1d808cace4db72f0a52f584a2f81 SHA-1: 2d1b198d0ebef9e88875e9f7fe5d04886f751b29 SHA-256: 61a32e71a8a28d4f64c29947df01621c27077dee6201a0e248f1d39aa02ea7a1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm, directing users to sites offering game hacks and free in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a phishing or malware distribution attempt. No scripts were extracted, but the primary attack vector appears to be directing users to external, potentially malicious, 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/ninja-hack-roblox-game-hack
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-free-spins-2021-app-download_GM406889139.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/minecraft-windows-free_GM479516143.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/robux-hack_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-robux-com-no-verification_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-get-free-roblox-on-roblox_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/roblox-dragon-ball-rage-cheat-engine_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/hack-any-roblox-account-2021_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/free-bane-mask-on-roblox_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/how-to-have-free-skin-in-roblox_GM431946152.pdf
    • http://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/como-generar-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000320f.bin
2ab56198fe7b60c4081fca39c564ecae8b6b0e79ca17467fa1f5d1756d9d02a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x320F 22688 bytes
font_01_sfnt_off00006504.bin
a6d27525091024e13383ebcd76abf36c9a7fed4bb4a2c092115849f8eb405f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 18964 bytes

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