Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf33120497da9ef…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 00:14:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7932130d6b7b280ca389efd31e1a0d91 SHA-1: 2836e98684bee1a889e3d4c0358cba3677b50aa3 SHA-256: eaf33120497da9ef7883d5e19a7137456c87f2145809501cee949687d9944347
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages related to game exploits and free currency, suggesting a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button lure further supports the malicious intent.

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.co/app/431946152/best-roblox-exploits-for-free-game-hack
    • https://repository.stikesindramayu.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-online-game_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/oprewards-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-gift-card-generator-no-survey_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-on-phone_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/comment-hacker-roblox-accesoir-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-download_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-vehicle-simulator-hack-download_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/obby-gives-you-free-robux-no-password-required-2021-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-robux-for-free-on-roblox-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/get-me-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-retail-tycoon-money-hack-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-guess-the-song-cheat_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031fc.bin
11adcc85f2d9b7d3fa56f88bd0cdd84e300fe11fa8829b820f52fdb4284fa801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31FC 22820 bytes
font_01_sfnt_off000064fe.bin
482960fe5d39104176b95e775e26967127e02a41bf58da5a0a6b095d047394df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 19048 bytes

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