Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d3ccda313cd57d…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 23:16:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 744f17d196469d8a4981353e04e4484a SHA-1: c91a8502828ddd1f3974933bcad223f7d8d3ca77 SHA-256: 08d3ccda313cd57d533cd024ba9522ab0cec091a04abc60a1947b2f6f1f71d64
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are structured as SEO-friendly slugs pointing to game-related content, suggesting a link farm or content-luring mechanism. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent to redirect users to external resources, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-pvp-hacks-game-hack PDF link annotation
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-tiktok-followers-without-downloading-apps_GM835599320.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-roblox-accounts-for-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
stream_004_off00004fff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFF 24736 bytes
SHA-256: 150c8c4421819df216618bc82150b8144dc643d01185464fabbdcb9881833a6e
font_01_sfnt_off000088d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D3 18180 bytes
SHA-256: 0e2f0ac061c68c7eb9671630210144f167660a9976ef74b494f6c2985e791cfa

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