Malicious PDF — malware analysis report

Static analysis result for SHA-256 24854856d7c8af80…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 01:33:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cdcb5816d426f910245738158cd0c7e2 SHA-1: aa449fbbd20230a73a6bacfb7cf2d49e41ef5283 SHA-256: 24854856d7c8af8076ea112d4c8e54f05ce85f4e0dcb25528d1509b717f35895
102 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to pages offering game cheats and hacks for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to drive traffic to malicious or scam-related content. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to external sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-spins-free-game-hack
    • https://www.bumbar-sport.hr/files/daily-coin-master-free-spins_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/coin-master-cheats_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/a-lot-of-robux_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/can-you-give-me-free-robux_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/robloxmatchcom-free-robux_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/how-to-hack-coin-master_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/how-to-download-wurst_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/get-free-robux-now_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/is-minecraft-free-on-mac_GM479516143.pdf
    • https://www.bumbar-sport.hr/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/roblox-pink-free-robux_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://www.bumbar-sport.hr/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • https://www.bumbar-sport.hr/files/minecraft-pe-server-hosting-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048bd.bin
8bf46bebae28de6234f0d6ebc985e3c64bc02a6ca28de4e26a0080ab835a4226
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BD 25112 bytes
font_01_sfnt_off000081da.bin
3a48050c63aabf25a2d2ed42cf8c513b78da245fbdfe2ff32403c31c4228eff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x81DA 18056 bytes