Malicious PDF — malware analysis report

Static analysis result for SHA-256 b678d696b555bce0…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 03:12:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5b3c45b166d751bff85c97a376ff0f10 SHA-1: c535622e89cfe83ec4905cf397b66ef6c1f84e7b SHA-256: b678d696b555bce03bd953c2bd80dfc70eec632bfae2f0be563a273cfac0cb91
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into downloading further malicious content. The embedded URL points to a resource that likely serves as a download link for a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-skirt-free-to-take-game-hack
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/minecraft-svg-free_GM479516143.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/minecraft-hacks-pc_GM479516143.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-mobile_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-co_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/update-coin-master-free-spins_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-cards-for-coin-master_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/my-roblox-account-was-hacked_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-pro_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054d3.bin
9b2b2c71780ccf7d7796e9ee8438f9e2c80e70efe11f2de05c0dab2bdf1f3551		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D3 26232 bytes
font_01_sfnt_off00009087.bin
24822c7a1e567f91f0b61115dc0f6e33aae97eb0a92ebde9a1eddcf644ccb3d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9087 18568 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.