Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79634a7d1b653f7…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 13:37:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b0545039599ba8869052f0a2f9901a1a SHA-1: 7090da23fbb05206a00e3a3479bf3dbdaf9bb580 SHA-256: a79634a7d1b653f70b3c67d4867d89fa4e40c0c9c2350de439d1b8c63bb08a70
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or drive traffic to scam sites. The presence of a download button lure further supports the malicious intent of directing users to download potentially harmful files.

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.tw/app/431946152/robuxglobalcom-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-hacked-client-bedrock_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-tix-and-robux-generator-2021-free-download_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-robux-redeem-codes_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-make-free-t-shirts-on-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/is-minecraft-earth-free_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/prison-break-16-hack-script-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/esp-roblox-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-without-a-generator_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-how-to-make-an-anti-cheat_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-hack-apk-download-pc_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/best-free-coin-master-spins_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/como-hackear-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/robux-hack-v1-0_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/pastebin-roblox-items-free_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-card-collection-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032bf.bin
11fd932fd71b4f79be4513caff60702eef650e9ee4bb043391eaf4fe7b1d7a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BF 22844 bytes
font_01_sfnt_off000065be.bin
77bdee58b98e4b81ad8b422e6c8a2d119f103232b777f7197d72db293d7d4d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 18884 bytes

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