Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfec9fbe973aec9…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 20:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9538738302e5f3bdf2b712a922aae260 SHA-1: 72f2dade07c97c7cdf27d155c17c834edf0c1bc8 SHA-256: 0dfec9fbe973aec98b14627425fd37274b78d017e87c16ad2e4e82d27fbe80d4
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are presented as PDF files related to game hacks and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to distribute malicious content or lead users to phishing sites. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'Download Now' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/old-roblox-accounts-for-free-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/tiktok-free-likercom_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524B 26936 bytes
SHA-256: 1876da5898718fabb275e7ceb3e31748081a79ce28a3e229b23a28fe764496c4
font_01_sfnt_off00008f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F40 2852 bytes
SHA-256: 6c344bff8cb11efcfa323542d02369dac514041cc19c9a49b1052cb126dcbdcf
font_02_sfnt_off00009902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9902 18368 bytes
SHA-256: f0ce6b820c45e6e2988b5e2b6f1fd71f334d25f96e0178b7a1255a1417217111

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