Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b57e18d1232930c…

MALICIOUS

PDF

33.2 KB Created: 2021-07-03 18:54:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2b7ba5c30a3887cf8e00e035d6364073 SHA-1: d471d9d3923420f1eeea927570edcdd9b7ff17ff SHA-256: 4b57e18d1232930ca7265920a0b313c404f7876daf9733a0f29898c4b64f45ba
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to game-related cheats and hacks. The primary URL http://netcdn.tw/app/479516143/free-minecraft-servers-to-join-game-hack is likely a lure to download a malicious payload. The ML classifier strongly indicated maliciousness, supporting the observed link farm behavior.

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/479516143/free-minecraft-servers-to-join-game-hack
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/roblox-jailbreak-cheat-speed-hack-2021_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/roblox-building-games-free_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/coin-master-free-spons-apk-2021_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/roblox-strucid-hack-script-pastebin_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/homo-jews-hacking-for-roblox_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/how-to-get-1-billion-free-robux_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/free-robux-sites-that-work_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/free-games-at-roblox-2_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/free-star-codes-roblox_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/how-to-get-a-free-shadow-dragon-adopt-me-roblox_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/coin-master-hack-tool-without-human-verification_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/hack-pp-jailbreak-roblox_GM431946152.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/coin-master-free-coins-hack_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://elevatorconsultant-online.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdb.bin
fdef82bbf0d1733fd9cc4b2aa4decfbf31cf0d925936cb79a3929711941a04c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 21572 bytes
font_01_sfnt_off00005f36.bin
6334088ed79f88688d6862b61048d09de9cdff8d6103e181d77f2de67e078c13
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F36 18276 bytes