Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc07cfc722f5db1…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 13:26:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d35bda66ee18b0238b815469835ae623 SHA-1: 9024af97f46c817cd18ae597d3ff68aa1a352a74 SHA-256: bbc07cfc722f5db1104cc155be63a846e2e849993f786769dfdfdd0d4b163e75
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and references to free Robux, game hacks, and other in-game currency, indicating a lure for users to download potentially malicious content. The presence of a PDF_SEO_LINK_FARM heuristic suggests a large number of generated links designed to appear legitimate. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/can-i-get-free-robux-game-hack
    • https://repository.stikesindramayu.ac.id/repository/when-you-you-download-roblox-is-it-free_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/arrest-me-and-get-free-robux-roblox-jailbreak-roblox-live_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/is-overdrive-roblox-exploit-free_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/minecraft-realms-free_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-cad-codes_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-plus-on-meep-city-roblox-2021_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-2021-robux_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/roblox-script-to-hack-into-an-accont_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdf
    • https://repository.stikesindramayu.ac.id/repository/free-robux-just-enter-username-no-verification_GM431946152.pdf
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdf
    • https://repository.stikesindramayu.ac.id/repository/april-roblox-roghoul-script-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c42.bin
4920999b0600717d3074820b48087322ce3131984e17ea4ff36b7d19d3fa2c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C42 23100 bytes
font_01_sfnt_off00006024.bin
1482418a342ed3f1ed9b37dd8c37f12d98a52023a9223b967d12e27c0c804d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 18820 bytes

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