Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efe872cf8d7b35f…

MALICIOUS

PDF

34.2 KB Created: 2021-06-28 14:14:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 38647905cf98b2ce489039f252becca5 SHA-1: dc60d188268eab47efdae9d24786d83f266c2c2b SHA-256: 7efe872cf8d7b35f673310d405a61a743ed52d037eb08d83e1ee35544cb5c7f2
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game-related cheats and free items. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The primary goal appears to be directing users to download potentially harmful content from the listed URLs.

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-cute-outfits-on-royale-high-roblox-game-hack PDF link annotation
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/cool-free-things-in-roblox_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hacker-robuxco_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-item-finder-hack_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-adopt-me-bucks-generator-free_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/download-free-cool-roblox-boy-outfits_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://densel.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A5 21780 bytes
SHA-256: 26497473a8c5201cbb9c3067f972def87b8cc84d842fda1041a5f6fe90ac22c1
font_01_sfnt_off00005ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 19360 bytes
SHA-256: c74af61e82600e426766f47185512e895a57b011a8e3e1f67563af5da798943c

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