Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d95701ece776ca…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 14:59:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d9c0e21ee42812d20037755a7d22a29e SHA-1: ac0d6d1085c3eac9d17c28f67182a53b908be7f5 SHA-256: a1d95701ece776caa8da273f2df668a0afee089fda41313c21ebdf00c2ffc24b
102 Risk Score

Malware Insights

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

The PDF document contains a call-to-action phrase and numerous embedded links, many of which point to external PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a link farm designed to attract traffic or distribute content. One prominent URL, 'https://netcdn.online/app/406889139/coin-master-hack-apk-download-for-android-mobile-game-hack', appears to be a lure for downloading an application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-hack-apk-download-for-android-mobile-game-hack
    • https://www.jcn.co.uk/uploads/files/files/free-promo-codes-for-robux_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/minecraft-java-for-free_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/robux-hack-generator_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/minecraft-free-app_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-any-roblox-account_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/robuxlove-net-free-robux_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/free-spin-generator-for-coin-master_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-tiktok-coins_GM835599320.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/games-to-get-free-robux_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/hack-a-game_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005317.bin
6f8cf4575530d01ea8f15d957be8da4d7fc0bea53fe69e75ce41675e48389318
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5317 24364 bytes
font_01_sfnt_off00008a9c.bin
9b8c4ac4c9b43c558f32175e9106326f8ee670f1239155596fca266ca3d28f0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9C 18792 bytes