Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb894acfab936c7b…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 20:50:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 23c54790a5cab713d41d7e59ff8c0ffd SHA-1: e878f8efc0ad865c9a8b5976381477ebee5a8a0c SHA-256: eb894acfab936c7b5c97eff85c4c8f6199a46445d7a17fd99bc270fb93f717e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to obtaining free in-game currency for Roblox, indicated by the document body and heuristic findings like 'SE_PAYMENT_REDIRECT_LURE'. It embeds external URIs, such as 'https://netcdn.xyz/app/431946152/how-to-change-your-roblox-username-for-free-game-hack', which likely serve as phishing or malware download links. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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 https://netcdn.xyz/app/431946152/how-to-change-your-roblox-username-for-free-game-hack
    • http://picuruta.com.br/images/codes-to-get-free-robux_GM431946152.pdf
    • http://picuruta.com.br/images/how-to-get-free-robux-website_GM431946152.pdf
    • http://picuruta.com.br/images/free-private-minecraft-server_GM479516143.pdf
    • http://picuruta.com.br/images/get-free-robux-no-human-verification_GM431946152.pdf
    • http://picuruta.com.br/images/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://picuruta.com.br/images/minecraft-survival-hacks_GM479516143.pdf
    • http://picuruta.com.br/images/roblox-inappropriate_GM431946152.pdf
    • http://picuruta.com.br/images/free-domain-for-minecraft-server_GM479516143.pdf
    • http://picuruta.com.br/images/earn-robux-by-watching-ads_GM431946152.pdf
    • http://picuruta.com.br/images/minecraft-pe-mod-menu_GM479516143.pdf
    • http://picuruta.com.br/images/free-coin-spin_GM406889139.pdf
    • http://picuruta.com.br/images/free-robux-no-gift-card_GM431946152.pdf
    • http://picuruta.com.br/images/roblox-g_GM431946152.pdf
    • http://picuruta.com.br/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdf
    • http://picuruta.com.br/images/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://picuruta.com.br/images/roblox-hack-codes_GM431946152.pdf
    • http://picuruta.com.br/images/free-free-robux_GM431946152.pdf
    • http://picuruta.com.br/images/coin-master-free-coins-today_GM406889139.pdf
    • http://picuruta.com.br/images/www-bandicam-com-free-robux_GM431946152.pdf
    • http://picuruta.com.br/images/minecraft-building-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046bf.bin
1b4490bf5fbd1a1a59d6f455b43c85a6a31d50ccb1095873e63498a2900e29da		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BF 24792 bytes
font_01_sfnt_off00007f9f.bin
50ecf7285bea5802cb0b20a8b9fdcfe95df60a9d9ebe9d63dbff9f8e980eaa15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9F 19540 bytes

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