Malicious PDF — malware analysis report

Static analysis result for SHA-256 9275928851fa59a1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 23:05:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 672edea4e3d3ae319660e50f35f20317 SHA-1: 21ec33f8ee234288b75e829e93305f9b24a74256 SHA-256: 9275928851fa59a142e5456c77b8baa57f08b624e14f77fde887e1568d6f20f3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text related to obtaining free Robux and game hacks, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of external URIs indicates a potential download or redirection to a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/add-robux-game-hack
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-premium-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-follow-bot-free_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/download-speed-hack-roblox-jailbreak_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/i-am-now-crying-because-i-got-hacked-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-roblox-codes-murder-mystery_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-terminator-genisys-cheat-codes_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-make-a-group-for-free-on-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/free-robux-scam-game_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-on-phone_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/hacking-apps-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/roblox-hack-no-survey-no-password_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/1-hack-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/joshy-how-to-get-free-robux-site-youtubecom_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/script-whall-hack-roblox_GM431946152.pdf
    • http://cartoriogoianira.com.br/ckfinder/userfiles/files/hack-skywars-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003020.bin
495437631c996abd59ab30a6b42c63fe2638efb7ac17435660c2ec35bfc08ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3020 21948 bytes
font_01_sfnt_off00006071.bin
512d4d7d2d522c0c0c377fbb1505fec489c5c43cce88f3b7b3f6df74f7c930d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6071 18728 bytes

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