Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bd2890b66f158c…

MALICIOUS

PDF

44.3 KB Created: 2021-05-19 19:53:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f19cf4f2ffd57d6f0d9746f04b5634d1 SHA-1: e1b944b60e408d716f66e252c253b633124bd4a1 SHA-256: 80bd2890b66f158cc62a68c347e3f5c03e10d54e3546815efeaceb89fe029ee9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized pages promising free game-related content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a coordinated effort to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/how-to-get-minecraft-for-free-on-mobile-game-hack
    • http://atmos-service.com/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://atmos-service.com/images/hacking-apps-for-roblox_GM431946152.pdf
    • http://atmos-service.com/images/coin-master-hack-tuts_GM406889139.pdf
    • http://atmos-service.com/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://atmos-service.com/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://atmos-service.com/images/coin-master-free-spin-reward-links_GM406889139.pdf
    • http://atmos-service.com/images/coin-master-free-spins-link-no-verification_GM406889139.pdf
    • http://atmos-service.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://atmos-service.com/images/how-can-i-get-free-robux_GM431946152.pdf
    • http://atmos-service.com/images/what-do-roblox-points-do_GM431946152.pdf
    • http://atmos-service.com/images/free-minecraft-codes-2021_GM479516143.pdf
    • http://atmos-service.com/images/minecraft-windows-10-edition-hacks_GM479516143.pdf
    • http://atmos-service.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://atmos-service.com/images/free-robux-easy_GM431946152.pdf
    • http://atmos-service.com/images/free-spin-link-coin-master-today_GM406889139.pdf
    • http://atmos-service.com/images/coin-master-free-coins-link_GM406889139.pdf
    • http://atmos-service.com/images/free-minecraft-client_GM479516143.pdf
    • http://atmos-service.com/images/coin-master-spins-free-2021_GM406889139.pdf
    • http://atmos-service.com/images/minecraft-apk-114-4_GM479516143.pdf
    • http://atmos-service.com/images/free-spin-and-daily-news-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004942.bin
6cc3c0648d653258d3825615d35dbd077c035762719a7e10032ca23cd51ad8a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4942 24640 bytes
font_01_sfnt_off0000812e.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812E 2912 bytes
font_02_sfnt_off00008b2b.bin
355b14cb1237cfcb324f2687d1fc3cafef0ca686705333751d3cf0333155011f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2B 18104 bytes

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