Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf3ed605c834a26…

MALICIOUS

PDF

43.4 KB Created: 2021-05-17 00:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ffccfe4252914a29f2725735dbd9475c SHA-1: 8bac322e44ae6431a97d66bf0969604e3228967f SHA-256: bcf3ed605c834a26db66cf592fa69539da35abc494b035d6c5a94b655ab776d6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to a malicious website, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-pc-game-hack
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-uk_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-soins_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/hack-spin-coin-master_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-shield-link_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/ways-to-get-free-robux_GM431946152.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/coin-master-game-hack-app_GM406889139.pdf
    • http://www.shivintech.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdf
    • https://collectrobux.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a98.bin
2fd5d822fe3919e8ed5a80faa9764a75921b3e4a5e594c3d74498f3205e1753b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A98 25964 bytes
font_01_sfnt_off000086cd.bin
3da4067756d8a9659bbf1d91e8f5987ff560a340f178cc4f41ff3c3676747205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CD 18436 bytes

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