Malicious PDF — malware analysis report

Static analysis result for SHA-256 8897dbad2e5c5422…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 16:18:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a509542f85ad529e56e054aaae7a5c4f SHA-1: 6a3bec1c9d61d7d467c0425e07aec7285289255f SHA-256: 8897dbad2e5c542244b99e3d261f8061503199cbc03201713f51164c1aec03b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a visible call-to-action, directing users to websites that promise game cheats and virtual currency. The heuristic 'PDF_CAPTCHA_LINK_LURE' indicates these links are designed to appear as CAPTCHA challenges, a common tactic in phishing and scam operations. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that it is part of a social engineering campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/how-to-get-free-robux-using-inspect-element-2021-game-hack
    • http://www.alrashed-alsaleh.com/userfiles/files/pubg-uc-olx_GM1330123889.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/202100-free-spins-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/scary-larry-roblox_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-scams_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/rich-free-roblox-accounts_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-place_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-fun-com-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/army-roblox-free-play_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-com-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-free-download_GM479516143.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/blox-land-free-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/microsoft-free-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-hack-in-roblox-without-recaptcha_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-hack-spins-download_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-free-clothes-generator_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-coin-master-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdf.bin
6b404996d6a4b496758ca55dd3c9fe64205726b7ee87ffdc838b31e71821574c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 22384 bytes
font_01_sfnt_off00006139.bin
d3924d4e3eccdc84f066e792e597b45bee04a6ff3053dca4b66b935645da06c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 20016 bytes