Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69929266c015191…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 01:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 86477e40d1bb4e7b0f2ccbca3f0b2826 SHA-1: 805b596a56bda411867c85354d036ee7f948a807 SHA-256: e69929266c0151917d3ab6e55d0039f61c8dee1dfe0b019ade789380f5aff3ac
82 Risk Score

Malware Insights

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

The PDF contains multiple invisible links and visible text that lure users with promises of game hacks (Roblox, Coin Master). These links point to other PDF files hosted on external domains, suggesting a multi-stage attack. The ML classifier strongly flagged this PDF as malicious, and the presence of CAPTCHA-themed lures indicates an attempt to bypass security measures or trick users into completing verification steps, likely for credential harvesting or malware delivery.

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/roblox-login-hack-password-game-hack
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-java-edition_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-c9m_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/number-glitch-free-robux_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/hack-coin-master-net_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-black-roblox-music_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/dominus-roblox-free_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-anti-hack-saving_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-resource-packs_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hacks-free-spins_GM406889139.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/comment-avoir-des-pices-dans-roblox-avec-cheat-engine_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-in-roblox-without-recaptcha_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-card-codes_GM431946152.pdf
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/hacked-accounts-in-roblox_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003414.bin
172bb42571dda0e0599837bcff76879674e3c32fb624303ec25f1c66bb285483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3414 22112 bytes
font_01_sfnt_off00006504.bin
f0bbcd36c1b4d07e2cc1012a19059a31dacacafc23c56be3442aec7910ff8780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 19268 bytes

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