Malicious PDF — malware analysis report

Static analysis result for SHA-256 9062b5b382cf3fec…

MALICIOUS

PDF

47.7 KB Created: 2021-06-07 08:23:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc1070369f6ab7a0b490d5d5bf962ed1 SHA-1: 6575236a6beaa9bb9cec9d79afb418b852562d03 SHA-256: 9062b5b382cf3fec876dcdae775b2b6ef06cf8f0fda87598b16bd2c25844deb7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to sites offering 'free Robux' and game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a phishing or malware distribution attempt. The document body, though partially corrupted, contains keywords related to Roblox and game hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-gift-cards-hack-game-hack
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/get-robux-for-free-2021_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/minecraft-free-download-windows_GM479516143.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-coin-master-spins-no-human-verification_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-link_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/coin-master-free-coins_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-free-robux-com_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/get-free-robux-now_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/coin-master-free-cards_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/why-can-i-not-hack-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053cc.bin
b56f0d16b66cf789d6854cb77ae3942d396be3fc99ad08b28c984c465082fb6d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53CC 30092 bytes
font_01_sfnt_off00009742.bin
2c4b422e990be2eb92cb9baec8fa7c0c5c29d1306ff9c603ec5f03780c637cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9742 18580 bytes

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