Malicious PDF — malware analysis report

Static analysis result for SHA-256 b693ffb36961feec…

MALICIOUS

PDF

37.4 KB Created: 2021-06-28 15:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1aa72e53be012263202edaed099219d SHA-1: a20a53af2abd417fe755133e6e0e2d5d58e46d0a SHA-256: b693ffb36961feec4cb155fe40929229f57f378bb7161a6fc09a96e17d2e988e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a lure for "Free Robux Generaters" and contains an embedded URI pointing to a potential download. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it is designed to lead the user to download a secondary payload. No scripts were extracted, but the overall pattern is consistent with a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.co/app/431946152/free-robux-generaters-game-hack
    • https://perpustakaan.smp1madiun.sch.id/repository/best-free-driving-games-on-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/cheat-bubble-gum-simulator-de-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/hackaroncom-free-robux-working_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-any-roblox-item-for-free-2021_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-free-download-android_GM479516143.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/hack-to-get-clothes-in-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-2021-robux-for-free-2021_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-free-ios_GM479516143.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/pagina-hacker-de-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/free-shirt-maker-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-free-candy-van-exploit_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-hack-a-roblox-account-password-2021_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-hack-r_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-com-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-generator-xbox-one_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/hack-strucid-stop-start-roblox_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-accounts-bugmenot-2021_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/what-is-the-code-to-get-free-robux_GM431946152.pdf
    • https://perpustakaan.smp1madiun.sch.id/repository/dbz-rage-roblox-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003cb1.bin
d17c8ce8de416bcac6a8cb9f9db62d156deccaecc75b9619595e20513a62f400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CB1 22196 bytes
font_01_sfnt_off00006e04.bin
ffec5dad6cb521c0649b0e6195e2df08065af96085db3356c9a7097a72980442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E04 18820 bytes

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