Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76df08748688a64…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 10:23:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ab9d95a57717191b32fe13cd24c8adac SHA-1: 60e651fd00315ff341dddbaebf36423236521869 SHA-256: b76df08748688a645a22d3a09280647c351bc4bcd9c35032ad13b700e5cf9132
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, heavily suggesting a phishing or malware distribution attempt. The document body and extracted URLs promote 'Roblox Free Vip Server' and similar game-related lures, indicating a social engineering tactic to entice users to click on malicious links. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-free-vip-server-game-hack PDF link annotation
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/robux-win_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/download-roblox-free-pc-windows-7_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/roblox-free-admin-how-spawn-monster_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-robux-no-steps_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/cheat-engine-roblox-code_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://disperkim.samarindakota.go.id/file/images/ckeditor/files/blogger-free-spins-and-coins_GM406889139.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_001_off00002c48.bin
4d0dc4a2477259e4d6c87f8cdc39121076d0fdc0c01c3a3bd1baeb54e319c9ec		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C48 22868 bytes
font_01_sfnt_off00005f99.bin
96e35452f05ae50322602f3f4f38b879b367f7c1a64e4b8b2405175cb301a9fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F99 19196 bytes

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