Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ed468fdb08d9cc…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 21:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0159702ee89831a7ff6baa4f9db86290 SHA-1: 5614f64b1241b8e469ad500c5cb86be6faa4393a SHA-256: d0ed468fdb08d9ccdbe37998176a4f71cfa3faca987c31ab94b41041b3e0aa2d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are structured as SEO-optimized PDF slugs, suggesting a link farm designed to drive traffic or distribute malware. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to potentially harmful websites or download further malicious content.

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/479516143/free-online-games-like-minecraft-game-hack PDF link annotation
    • http://addair.co.uk/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://addair.co.uk/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://addair.co.uk/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://discord.ggIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9A 24188 bytes
SHA-256: bb6fc3497423eb1b72ff8f8f58a8560858d96ab3c14d8c2d472d3e40749a66ef
font_01_sfnt_off0000816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 18072 bytes
SHA-256: 246b849e2f56f6dfbc2c344cbb2402d5c34ee1f8458d292b794ed9a5a308c484

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