Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e298ea0bdad58ea…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 08:05:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e5f4bc13af812e2025430e362d6c03aa SHA-1: 2e86e1e2b1ed3b315dadede96443871c70968826 SHA-256: 8e298ea0bdad58ea6f8d49eea8424f0183dcc7d69faa28b91a78f70f96e2d9c0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, identified as a 'link farm' by heuristics, pointing to sites offering free in-game currency and cheats for popular games like Robux and Coin Master. The presence of a 'download button' heuristic further suggests a deceptive call to action. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it leading to scam or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/robuxy-com-free-robux-generator-game-hack
    • https://perpus.upp.ac.id/digilib/repository/coin-master-code-for-free-spins_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-apk-july-2021_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/can-i-get-free-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/claim-gg-free-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/websites-that-give-free-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-mods-for-pc_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-2021_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/claim-free-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-gift-codes_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/pokemon-go-free-and-nintendo-switch_GM1094591345.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-spin-in-coin-master_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-online-no-human-verification_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/minecraft-free-download-laptop_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/roblox-hack-2021_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/roblox-mobile-hack_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/robux-game_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ec8.bin
484e665869974bf8e3f470543a3c46b1470c7e308f3b764cc264ff75b36a61aa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC8 27772 bytes
font_01_sfnt_off00008ebe.bin
3f19a46cd7576be6c418edd674f6efd804a84ddba815b78c75ab608c22ea1705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBE 18784 bytes

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