Malicious PDF — malware analysis report

Static analysis result for SHA-256 314b4fccca40e395…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 15:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 08f0f8dda4ff6226615d65c2fe50f54e SHA-1: 8373bf8ada265b3167e200a1d9566ab8270bb262 SHA-256: 314b4fccca40e395e7c67f11e811a7de18c1d769c6f55b33eb8338c211585309
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized and related to game cheats and free in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to drive traffic to potentially harmful sites. The document body, though heavily obfuscated, contains a URL that aligns with the overall theme of game-related lures.

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/479516143/if-i-uninstall-minecraft-can-i-reinstall-it-for-free-game-hack
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-app_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/get-free-robux-without-human-verification_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/free-robux-today_GM431946152.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/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/moonactive-free-spins-coin-master_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/bloxland-earn-free-robux_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/play-minecraft-for-free_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/hack-coin-master-spin_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/minecraft-pe-free-download-android_GM479516143.pdf
    • https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-2021-robux_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/mcpe-master-coins-hack_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-daily-1-ga_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/earn-free-robux-on-roblox_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/can-i-get-robux-for-free_GM431946152.pdf
    • https://www.jcn.co.uk/uploads/files/files/coin-master-card-hack-apk_GM406889139.pdf
    • https://www.jcn.co.uk/uploads/files/files/robux-free-c_GM431946152.pdf
    • https://www.yout
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005261.bin
1382c9e6a35062bf5d281bb0184009ca9bd3cdc9a58d444f01c8549a1cb5c71b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5261 24244 bytes
font_01_sfnt_off00008977.bin
58848056166ef862e589a8a767e64d1dece6368d26464edd619a575d32e976bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 17972 bytes