Malicious PDF — malware analysis report

Static analysis result for SHA-256 574eb2968003ef2a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-28 07:51:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bd63226e0a9bb8767fc03210a9e7087c SHA-1: 79cbbe96b2948514164c227d8282371d9785f0f3 SHA-256: 574eb2968003ef2ab44b91f1ab0abfa12ebd9ece7993dede7fa97ca5cceda957
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or scam attempt. The document body and extracted URLs promote 'free Robux' and 'Coin Master hacks', indicating a lure for users seeking in-game advantages. The ML classifier also flagged this PDF as malicious, reinforcing the assessment of a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/roblox-free-robux-april-may-2021-game-hack
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/easy-coin-master-hack-without-verification_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/spin-link-coin-master_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/minecraft-free-computer-game_GM479516143.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/paginas-de-hacks-de-roblox_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/clean-master-hack-coins_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/online-coin-master-free-spin-app_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/roblox-hack-2021-may_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/hack-fhantom-forces-roblox_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-hack-without-verification_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/free-boy-clothes-on-roblox_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/how-to-get-more-robux_GM431946152.pdf
    • http://www.med-aid.vn/ckfinder/userfiles/files/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e23.bin
7b0779efd6d4b069ffdad4298c0f10a960c2a43b397670b542903801bf252ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E23 21704 bytes
font_01_sfnt_off00005df4.bin
6939e9721f48b4c6e9618e2d43949010a60dad5258970e30a352c8e1b7b12a91
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF4 19864 bytes