Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25128ad38dd97ef…

MALICIOUS

PDF

46.2 KB Created: 2021-05-19 14:47:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7709704a95baef66cb6f226275d9c5b2 SHA-1: d5e66fb2d46c4954e4c91593931e7664bb1640c1 SHA-256: d25128ad38dd97efc1745b80394e61cc3ed3f17395c1d1a37e40d53cb7eb5002
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to domains associated with SEO link farms. The primary URL, https://netcdn.xyz/app/479516143/best-free-minecraft-server-hosting-reddit-game-hack, suggests a lure related to gaming. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier flagged the PDF as malicious. While no scripts were explicitly extracted, the structure and numerous external links strongly suggest a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/479516143/best-free-minecraft-server-hosting-reddit-game-hack
    • http://bilhetim.com.br/images/good-free-minecraft-server-hosting_GM479516143.pdf
    • http://bilhetim.com.br/images/free-promo-codes-for-coin-master_GM406889139.pdf
    • http://bilhetim.com.br/images/youtube-free-fire-tik-tok_GM835599320.pdf
    • http://bilhetim.com.br/images/robux-free-com_GM431946152.pdf
    • http://bilhetim.com.br/images/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • http://bilhetim.com.br/images/static-moonactive-net-rewards-2021_GM406889139.pdf
    • http://bilhetim.com.br/images/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://bilhetim.com.br/images/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://bilhetim.com.br/images/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://bilhetim.com.br/images/roblox-gift-card-online-free_GM431946152.pdf
    • http://bilhetim.com.br/images/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • http://bilhetim.com.br/images/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://bilhetim.com.br/images/minecraft-tiktok-hacks_GM479516143.pdf
    • http://bilhetim.com.br/images/coin-master-32-hack-apk-download_GM406889139.pdf
    • http://bilhetim.com.br/images/minecraft-kill-aura_GM479516143.pdf
    • http://bilhetim.com.br/images/coin-master-hack_GM406889139.pdf
    • http://bilhetim.com.br/images/best-free-roblox-outfits_GM431946152.pdf
    • http://bilhetim.com.br/images/how-to-actually-get-free-robux_GM431946152.pdf
    • http://bilhetim.com.br/images/free-spins-coin-master-links_GM406889139.pdf
    • http://bilhetim.com.br/images/how-to-hack-coin-master-game-2021_GM406889139.pdf
    • https://discord.gg
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e0b.bin
6d249d1d441843f32eb78bdc04c8c42889ea5670a9a45bb9ffa0e6965f8dfde0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0B 25396 bytes
font_01_sfnt_off00008796.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 2840 bytes
font_02_sfnt_off00009148.bin
d871dcb748a79589dfb9206c8c26b1b31a59c6b5fd6e64801d8efc9cfdffb698
pdf-font-stream PDF embedded font (sfnt) at offset 0x9148 18504 bytes