Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4befd8e12d11f0…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 02:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6b327ebaa61a7005b9ff583b0d7d1995 SHA-1: 139c20c69696962a6c008b3801f07f3fb36f0be9 SHA-256: 3f4befd8e12d11f0026ab929f958acf1f1697ccdd4e4983878fcd74a74216dd6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are structured as SEO-optimized PDF links. The document body, though partially corrupted, contains a URL that appears to be a lure for game-related cheats or free items. The presence of a large number of external links and the ML classification strongly suggest malicious intent, likely for phishing or directing users to potentially harmful 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/is-minecraft-free-on-xbox-game-hack
    • http://esm-royet.de/images/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://esm-royet.de/images/free-robux-mod_GM431946152.pdf
    • http://esm-royet.de/images/free-accessories-roblox_GM431946152.pdf
    • http://esm-royet.de/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://esm-royet.de/images/how-to-hack-coin-master-with-root_GM406889139.pdf
    • http://esm-royet.de/images/free-spins-coin-master-links-app_GM406889139.pdf
    • http://esm-royet.de/images/ways-to-get-free-robux_GM431946152.pdf
    • http://esm-royet.de/images/robux-generator-no-verification-needed_GM431946152.pdf
    • http://esm-royet.de/images/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://esm-royet.de/images/toolbox-for-minecraft-pe-ios_GM479516143.pdf
    • http://esm-royet.de/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://esm-royet.de/images/how-do-u-get-free-robux_GM431946152.pdf
    • http://esm-royet.de/images/coin-master-free-cards_GM406889139.pdf
    • http://esm-royet.de/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • http://esm-royet.de/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • http://esm-royet.de/images/free-robux-kid-friendly_GM431946152.pdf
    • http://esm-royet.de/images/instant-robux_GM431946152.pdf
    • http://esm-royet.de/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdf
    • http://esm-royet.de/images/coin-master-time-hack-ios_GM406889139.pdf
    • http://esm-royet.de/images/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049f8.bin
48e0e145fa3d820200f2e9b12892eb03ccf858cddeb3e70d2c26fd3d0a72b36a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F8 25596 bytes
font_01_sfnt_off0000840d.bin
19d9535fd2d352d2586ba99854d4ae80d513f2901e16ae506060a78b50b635a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x840D 18304 bytes

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