Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e3db17645af8db…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 14:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 115dfd82cb4ba52513fa4bbbe4d5066e SHA-1: d806a2fa3f3f95f29ee8c934d780fad2fab00c54 SHA-256: a3e3db17645af8db6235034bcb59386be4bcefa86d52986b57f6ccc965ce02d7
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering game-related cheats and freebies. The primary URL, 'https://netcdn.online/app/479516143/free-minecraft-domain-game-hack', suggests a lure for potentially malicious downloads or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/free-minecraft-domain-game-hack
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/pokemon-go-free-promo-code-2021_GM1094591345.pdf
    • http://library.ft.upnvj.ac.id/repository/free-800-robux_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-points_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-kill-aura_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/toolbox-mod_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/free-coin-coin-master_GM406889139.pdf
    • http://library.ft.upnvj.ac.id/repository/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://library.ft.upnvj.ac.id/repository/roblox-generator-no-human-verification_GM431946152.pdf
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052c5.bin
d3c68a8090039f67ac7117d7e4bbac3d6a95521f8c99cd6adc1f0ba01aeb17cc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C5 25980 bytes
font_01_sfnt_off00008ddb.bin
76c28744f84ad7629b6da3b9b5fa316c70ee5e9c8c86c1afc77ec6d129fcd0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDB 18140 bytes

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