Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2ae4f8e20a0bba…

MALICIOUS

PDF

51.0 KB Created: 2021-06-09 09:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8875d15b70b27e07dd71e078ec8e4f26 SHA-1: 2c786cc4774ff4fbc873477edae6bea30d5aec02 SHA-256: 6d2ae4f8e20a0bbacd103fcdb3f61228fc41817422268a3744add4ff9ef5d254
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which appear to be part of a link farm designed to attract traffic. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate malicious intent. The document's content, though garbled, suggests lures related to game cheats or free items, a common tactic for distributing malware or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.tw/app/431946152/free-music-codes-for-roblox-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-mac-no-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000519d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519D 25656 bytes
SHA-256: 9528f42d50345285773ff60f7ca371fd2b27f09bb142a465e809d0d231c20419
font_01_sfnt_off00008cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off000096af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C1 18576 bytes
SHA-256: a4ec7e6d42d66c73c440697b5b87c7fb316d8254dd6e80a5c1e7f2e0a04e62f3

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