Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c4f07917211749…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 07:25:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee51175ab809ebd8c25cee7fb88798ab SHA-1: 6c9c3218cbf269dcc9b8d8653c6ede3b9e9c5dc3 SHA-256: 50c4f07917211749a0988b2e2f08ec03adb697364eff40f40c6239fcdf1541f5
102 Risk Score

Malware Insights

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

The PDF file contains a "Robux Claimer" lure and a "Download Now" call-to-action, indicating a phishing or scam attempt. It embeds a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL https://netcdn.online/app/431946152/robux-claimer-game-hack is likely the intended destination for downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/robux-claimer-game-hack
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-app-free-download_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/blox-world-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-login_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/block-best-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-glitches_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-snacks-link_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-online_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/the-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-you-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f2e.bin
209aec0cd9e1d453f00e619685e584de6c5bf4694564419a80e9566602fa230f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2E 27120 bytes
font_01_sfnt_off00008dd0.bin
1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD0 2824 bytes
font_02_sfnt_off0000977c.bin
f8d3cbf6c99adbc4a00682e2952441b72e35b63b7e0e02c452fe01b9b955693e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977C 18532 bytes

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