Malicious PDF — malware analysis report

Static analysis result for SHA-256 226460c98c9cc0a0…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 03:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e444aae48633611c30727d98ace1fde3 SHA-1: 52b98ec055ea243692e3e652132c0610a2f0e577 SHA-256: 226460c98c9cc0a051cff3bfd38da23a1eb1e947fca19e5e1ff7e959785e81c1
110 Risk Score

Malware Insights

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

This PDF document utilizes an XFA form and contains a large number of embedded external links, many of which are SEO-optimized and point to game-related hacks and downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic suggests a lure to download further payloads. The document's content and structure indicate a phishing or scam attempt to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/can-users-on-roblox-make-free-hats-game-hack
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hacker-humping-me-in-roblox_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/robux-free-hack-no-verification_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-geometry-dash-roblox-odes_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/freespinandcoin-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f38.bin
478e1e83146a59a4d7d19aa77f5eb106c53cf645456a1ba73738686496ccd9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22192 bytes
font_01_sfnt_off0000609b.bin
c9a3ad7c53a11ef60ff147a3c9769c22eabece79c185999bf8bf95c446a24ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 19120 bytes

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