Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a5a2b582ec5943…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 19:56:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 409d9cb079ed648a6506a3262e6c31e7 SHA-1: 6cfba3b0a167a6d016f8ef994a7541571c8292c0 SHA-256: c0a5a2b582ec5943edece986ed57b161cdc8cc81dbebf8786ba669b6f6bd8cdc
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be related to game cheats and virtual currency hacks, such as 'Coin Master Unlimited Spin And Coin Hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to potentially malicious or scam-related content. The presence of a call-to-action phrase further supports the intent to lure users.

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.tw/app/406889139/coin-master-unlimited-spin-and-coin-hack-game-hack
    • https://opac.heritagejkt.org/repository/free-robux-in-1-second_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/how-to-make-a-cool-free-roblox-acount_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/roblox-how-to-make-a-private-server-for-free_GM431946152.pdf
    • https://opac.heritagejkt.org//repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://opac.heritagejkt.org/repository/coin-master-spin-hack-2021_GM406889139.pdf
    • https://opac.heritagejkt.org/repository/mcpe-client_GM479516143.pdf
    • https://opac.heritagejkt.org/repository/free-roblox-clothes-templates-pants-galaxy_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/free-vip-admin-commands-with-all-permissions-for-roblox_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/gain-robux_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/2021-robux-for-free_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/roblox-hack-stats-one-piece-millenium_GM431946152.pdf
    • https://opac.heritagejkt.org//repository/can-you-give-me-free-robux_GM431946152.pdf
    • https://opac.heritagejkt.org//repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • https://opac.heritagejkt.org/repository/free-roblox-shirt-codes_GM431946152.pdf
    • https://opac.heritagejkt.org//repository/free-spin-and-coin-blogspot_GM406889139.pdf
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/blue-pants-roblox-free_GM431946152.pdf
    • https://opac.heritagejkt.org/repository/spin-hack-for-coin-master_GM406889139.pdf
    • https://opac.heritagejkt.org//repository/coin-master-hack-version-download-ios_GM406889139.pdf
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-2021-september_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000328a.bin
41bc3d9c0f0e0116838cbbb4bb9bf73c85819b4f919fd0aef1c6f37e1a9d6a48
pdf-font-stream PDF embedded font (sfnt) at offset 0x328A 22356 bytes
font_01_sfnt_off00006450.bin
683d1ed81dd33ebaaf95d4e5e2ae682e492707e49601d3e94d1f375d2e9db975
pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 18876 bytes