Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cf7b02fc0017dd…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 04:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fdd580dd4c409c4e543ea4a0a1b08fc7 SHA-1: 18cf85d8f3f818cd876d5a2451824f641036b1f6 SHA-256: a9cf7b02fc0017dde9ac1fcf0e2388a92089b8d62d15f250ab0191ea241c805f
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URLs, one of which is directly linked to a potential exploit or download. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of these elements suggests the document is a lure for downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/google-play-coin-master-free-spins-game-hack PDF link annotation
    • https://creationegyptco.com/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/get-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/master-coin-free-link_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_003_off00004a1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1D 24500 bytes
SHA-256: 244b6024751152488a28f59c82e2cb5c867e95df3f4ab32fde7bf3251bbeb034
font_01_sfnt_off00008247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 18580 bytes
SHA-256: 159b8c9b1a2eefbbab3f5eb8e11562dfe96c3187e7709bb0bd16e4420bc442bb

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