Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe5506be37ae44f…

MALICIOUS

PDF

50.1 KB Created: 2021-06-03 05:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc620b0211e89bb87752970e2dafc1aa SHA-1: 5453ee7ed83e45037f95c894dfaf59e8989e6ce5 SHA-256: 0fe5506be37ae44f4ef26788cb2688824c1accdbf2495959fef9648e5c26044b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many with long, SEO-like titles, suggesting a link farm designed to drive traffic to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the heuristic firing for a 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to direct users to external resources, likely for malicious distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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 https://netcdn.online/app/431946152/how-to-hack-roblox-accounts-2021-on-pc-game-hack
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-and-spin-link_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-aimbot_GM479516143.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-codes_GM479516143.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-hack_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-gift-cards_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/promo-code-free-robux_GM431946152.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-no-offers_GM406889139.pdf
    • http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053be.bin
a5f53ee7d7bdaaf18bd97dedb205fbae65717a80f89d16650cd81643094701f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BE 27236 bytes
font_01_sfnt_off000091c8.bin
608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C8 3608 bytes
font_02_sfnt_off00009e50.bin
b30918057c84a760b6e1e1b9b29afa3ee5c14ff72723d61b739c1884c53dfce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E50 19144 bytes

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