Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd08588fa7a0d58…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 03:02:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c568360f81b7335add52b96445b2001f SHA-1: 6f0124c0cfabf05008ceb0c6919f390d0a59ab58 SHA-256: 4cd08588fa7a0d58efb977dfb1f63585c817588e4f35ae8d2141210e3ade6dda
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to sites offering game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a potential download or redirection to malicious content. While no scripts were explicitly extracted, the structure and embedded links indicate a lure for users to click through to potentially harmful sites.

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.tw/app/431946152/roblox-hacks-and-cheats-game-hack
    • http://lib.akpnbahtera.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/dominos-hat-roblox-for-free_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/roblox-free-roblox_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/earn-free-robux-today_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/coin-master-game-hack-version-download_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/robux-gratis-2021-sin-hacks_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/robux-free-hack-no-survey-2021_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/coin-master-card-collection-link_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-to-free-robux_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-tiktok-followers-and-likes_GM835599320.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-gold-cards-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec0.bin
3cfe80f3d4a18a5516bb91ba0e679a9029982c9a551bfb81ad64e0346632589b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC0 21628 bytes
font_01_sfnt_off00005e3b.bin
964942e37439f8f9ab640eaa6d4c9b22aea120d806056d36c6a4670d34d844b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3B 19100 bytes

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