Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c28d630b9ecb99…

MALICIOUS

PDF

35.6 KB Created: 2021-06-28 01:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: be7100785ed0c82fcac950a617a676c7 SHA-1: 51a3ea1adc96def19d6f83756f1945895899e5ff SHA-256: 99c28d630b9ecb99578a1abbf859b97bac836e0d69893f9614029450cb113978
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded URLs and a document body referencing 'Roblox Hack Robux Apk 2021', indicating a lure for users seeking game cheats or exploits. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly suggest malicious intent, likely to distribute malware disguised as game-related tools. No scripts were extracted from this sample.

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.co/app/431946152/roblox-hack-robux-apk-2021-game-hack
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/earn-robux-for-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-download-or-human-verification_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-download_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-boku-no-roblox-remastered-hack_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-only-username_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-education-free_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-codes_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-today-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/picture-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-flee-the-facility-hack-script_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032ab.bin
ef504bf50fbaae450f31e31cea8d41444b76c3d0365b5fa2bde96c6ddf9e42b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32AB 22680 bytes
font_01_sfnt_off00006537.bin
bd586e98bd31fb9af6d77934b72a1f33c097d3727ad6bed81b8f87051e88ec88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 19372 bytes

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