Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be6cfa855ca8ce8…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 08:53:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b61628bc0d45679a453bd429f5c6bd89 SHA-1: 0a7e3b9d6e55af8fd5b78fe8ef139c6b27042800 SHA-256: 7be6cfa855ca8ce81505cd6f13294cb443e86b09ba436e435a69bda4d17ed6cb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, including a primary external URI to 'http://netcdn.co/app/431946152/codes-that-are-get-free-roblox-game-hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a coordinated effort to direct users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to game-related hacks and exploits, reinforcing the lure to click these links.

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/codes-that-are-get-free-roblox-game-hack PDF link annotation
    • https://pustaka.stie-pembangunan.ac.id/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/wearedevs-roblox-exploits-and-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-game-passes-vehicle-simulator-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-promocodes-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BF 22600 bytes
SHA-256: 03469f59c3f6a49fabdebc6b0f71cce8ee300e9f87badc0cf8b1062389f2f0cc
font_01_sfnt_off0000640a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 19092 bytes
SHA-256: 953a8a409d264a887514e8a06e8bc3484f164d144075db73be50ff4e04d38fc7

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