Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ecc7c1f3eeb9c4…

MALICIOUS

PDF

36.0 KB Created: 2021-06-26 21:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 58e13b7e332cdc262b39aadd41d5ab81 SHA-1: 319d4e5afab8c8f5cba835273495b355ccbc56c2 SHA-256: 15ecc7c1f3eeb9c49151aaa88548f5629ef1c30be2c8fc84a90f99ab0f319941
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes a 'Free Roblox Robux Generator' and other game-related scams. The presence of a large number of external links, many pointing to PDF files with similar scam-related titles, indicates a link farm designed to attract users seeking cheats or exploits. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful sites or download pages.

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/free-roblox-robux-generator-2021-no-human-verification-scam-game-hack
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spin-today_GM406889139.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-hack-generator-robux_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-roblox-followers_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-rewards_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-hack-fast_GM406889139.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-without-download-apps-or-survey_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-free-play-no-download_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-earn-robux-on-roblox_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-unblocked-at-school-hacked_GM431946152.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-link-today_GM406889139.pdf
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-card-hack-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033c9.bin
7a96dae415b659530f502eac492c7b4fc3f8b5507b7f6bf1c59eac40401d6ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C9 22396 bytes
font_01_sfnt_off0000658c.bin
5e20bc8d1f556239c914270c7be9d5fd4d4d13b008239d86b2beb49179b78f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 19812 bytes

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