Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e4e29557e9a9e7…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 06:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a5643e9a9e2552195249c07657ed8ee0 SHA-1: c68d421be32518a120cac76d005ad5b9347fc03f SHA-256: b3e4e29557e9a9e7eff3a27d893528ecda7cea12dd11fc99eb03a76d94dbe81d
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URLs, such as 'https://netcdn.online/app/431946152/how-to-get-free-robux-2021-no-human-verification-game-hack', likely lead to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/how-to-get-free-robux-2021-no-human-verification-game-hack PDF link annotation
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005490.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5490 25492 bytes
SHA-256: 97bb42dc622a9552ec1cfbfda4968970c3c9dc9888e24c3d0980e981d78bc2bc
font_01_sfnt_off00008edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDF 19428 bytes
SHA-256: dfc7ca414cfca4f80301273998e01ceb4bfd22e3de883fcbe9d6a0102e8d41a4

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