Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcead58f7b96ee01…

MALICIOUS

PDF

36.1 KB Created: 2021-07-09 05:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bbb56a371325bd432a5299e61913c609 SHA-1: 95c99bf3b1801241681e13069e0333abce00d7bc SHA-256: dcead58f7b96ee01f5aeda63701fa281b391a891e299fb745a67f9692a6dc66f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, forming a link farm, that point to other PDF files related to game hacks and cheats. The primary URL http://netcdn.tw/app/431946152/mobihack-net-roblox-hack-game-hack likely serves as a landing page or initial download source for malicious content. The ML classifier strongly indicated maliciousness, supporting the interpretation of this document as a lure for potentially harmful downloads.

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/mobihack-net-roblox-hack-game-hack
    • https://cursocejas.com.br/imagens/userfiles/files/mobihack-roblox-hack_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/where-tiktok-free-view-iphone-11_GM835599320.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-robux-on-roblox-2021-ipad_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/free-links-coin-master_GM406889139.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/vip-area-for-free-in-roblox-texting-simulator_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/como-hacker-el-server-de-naruto-final-bond-roblox_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/apocalypse-rising-hacks-roblox-crash_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/packet-of-world-free-robux_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-hack-roblox-cheat-engine-66_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-freer-package-roblox-2021-july_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/minecraft-server-hacks_GM479516143.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/diamond-cheat-roblox_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-gift-card-codes_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-100-spin_GM406889139.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/fan-page-coin-master_GM406889139.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-free-magma-fiend_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://cursocejas.com.br/imagens/userfiles/files/free-roblox-wings_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033cf.bin
cc70ff515101595a9cec4cf8aa2f2b73870a08e41b601ab62b03996baf6b068c
pdf-font-stream PDF embedded font (sfnt) at offset 0x33CF 23196 bytes
font_01_sfnt_off000067af.bin
88e598bc89789b8ac21b9f126080391bbc9d3fa977fc33123edec0983ecad616
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 19244 bytes