Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8ad14a8a3f416b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 13:08:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ec19acb725d6813db00062f6dd996669 SHA-1: d842e78addc7c45046cbbca4597355325cdc432d SHA-256: da8ad14a8a3f416b1e9e5a05882d53bb2c89f5053851ae1a77763c67a2e4ffb4
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are related to game cheats and free items, suggesting a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-free-spins-and-coins-link-haktuts-game-hack
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/get-free-roblox_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/roblox-speed-hack_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/free-minecraft-account-and-password-2021_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/robux-generators-that-actually-work_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-hack-ios-10_GM406889139.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/robux-free-c_GM431946152.pdf
    • http://balishakirana.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a2d.bin
fa0c724b9c618f9e21c347eb4626a8b901359308484995d2d2abcdc59ec4a4bb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2D 24932 bytes
font_01_sfnt_off00008392.bin
d0160522c9507928c114f36e82183f3878c9bb5f52b4c502e96d0270f56f9c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 18372 bytes

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