Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfbfcb52850b933…

MALICIOUS

PDF

47.1 KB Created: 2021-05-14 15:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 866a9757bc3d5233c5a4d4168b934156 SHA-1: a55f81ed2bf298990f66598a8ed66ae006708454 SHA-256: 0dfbfcb52850b9337e33fe02f6fe635c78106422bdd940c910f21120797f70c6
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a specific external URI, all pointing to sites that appear to be part of a link farm designed to lure users with promises of game hacks and free in-game currency. The presence of a "download button" heuristic further supports the malicious intent of directing users to external, potentially harmful content. The document's structure and content suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/roblox-download-pc-free-game-hack
    • https://www.hotschool.com.au/images/roblox-gift-card-free-codes_GM431946152.pdf
    • https://www.hotschool.com.au/images/free-robux-no-verify-2021_GM431946152.pdf
    • https://www.hotschool.com.au/images/robux-money_GM431946152.pdf
    • https://www.hotschool.com.au/images/how-can-u-get-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://www.hotschool.com.au/images/free-card-link-coin-master_GM406889139.pdf
    • https://www.hotschool.com.au/images/roblox-demon_GM431946152.pdf
    • https://www.hotschool.com.au/images/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • https://www.hotschool.com.au/images/how-to-make-a-minecraft-client_GM479516143.pdf
    • https://www.hotschool.com.au/images/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://www.hotschool.com.au/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://www.hotschool.com.au/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • https://www.hotschool.com.au/images/scary-larry-roblox_GM431946152.pdf
    • https://www.hotschool.com.au/images/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://www.hotschool.com.au/images/to-get-free-robux_GM431946152.pdf
    • https://www.hotschool.com.au/images/easy-coin-master-hack_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-flip-master-coins_GM406889139.pdf
    • https://www.hotschool.com.au/images/free-apk-mod-coin-master_GM406889139.pdf
    • https://www.hotschool.com.au/images/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004968.bin
5572e102692bd0c7376684162a04033b09a4f83e4b81f7bdfb8b06612fb428a4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4968 26364 bytes
font_01_sfnt_off000086e2.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 5696 bytes
font_02_sfnt_off000093f3.bin
335401c7e69d4718b9355a16245a633da97680606d3b3322095c59b658246ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F3 18836 bytes