Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f260d6f807b61e…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 09:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0dcfed39129929c971f6f0fce406365f SHA-1: 2eae2547fefc81f86831c1005a139094c674795b SHA-256: c4f260d6f807b61eae1fa8e4f5c76e953945710dd5f116846184d0d012ae17aa
82 Risk Score

Malware Insights

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

The document contains multiple embedded URLs pointing to sites offering game-related cheats and hacks, strongly suggesting a lure for downloading malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may instruct the user to provide a password for an archive, a common tactic to bypass security filters. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/roblox-free-play-game-hack
    • https://ifef.es/ckfinder/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/mcpe-client_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/hacked-roblox-game_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-free-play_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/www-coin-master-hack-com_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/robux-generator-no-human-verification_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-download_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-wheel_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/unlimited-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-free-robux-com_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spain_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005299.bin
4c869387a907f957448832191403c36a4c9ab41b4accc86f4de5557f9ae58eeb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5299 25628 bytes
font_01_sfnt_off00008d3a.bin
eed476aa069bc09357c43ec056cace655c39995f669be6a5bb4491b7d3b62334
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3A 18512 bytes