Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d84fe44828befc…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 06:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2fc4949f3e41c2f8d3e048694eaa7cdb SHA-1: 63ddd049209c975e4c63132ebc809c0c5f007ac5 SHA-256: 76d84fe44828befc068e2334cb8e5d26f2dabe98861e9daf7b04bd9cc6a8b4b6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'doc body' that explicitly advertises 'Free Robux' and game hacks, indicating a phishing or scam lure. The presence of a 'PDF_SEO_LINK_FARM' heuristic and a high ML score further supports its malicious nature. While no scripts were directly extracted, the document's structure and content strongly suggest it's designed to redirect users to malicious sites for downloading unwanted software or engaging in fraudulent activities.

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/get-free-robux-skin-tone-game-hack
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-logo-favor-bag_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/hacks-roblox-csgo_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-offers_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-gratis-hack-descargar_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-can-i-hack-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-exploit-11-19-16_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-exploit-for-free-download_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-hack-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/claim-roblox_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1a.bin
cf82439d8cdd8088b16f0d836a97187387cd1f9030eba0f857273b2745858d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22508 bytes
font_01_sfnt_off00006153.bin
ac26aa88d42ae855da54fd81ebd66bc2c29f5c0ac927492b43bb402a22483087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 19108 bytes

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