Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4be4bf279402cd…

MALICIOUS

PDF

43.5 KB Created: 2021-06-02 06:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9f0638f4a57f5b903cbe5dd423e56cbc SHA-1: bd5fff9b7aed0e57c1d261298f3be33c4b4b03aa SHA-256: ec4be4bf279402cd18a97b628397be8ea8df6d641db405286cc327ff6cca2089
82 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's malicious and attempts to lure users into executing commands via copy-pasting into a shell. It also contains embedded URLs, one of which is `https://netcdn.xyz/app/479516143/free-minecraft-skins-game-hack`, suggesting a download or redirection to a malicious site. The document body, though heavily obfuscated, contains references to game-related terms and URLs, aligning with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/free-minecraft-skins-game-hack PDF link annotation
    • http://msfs-eastafrica.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_off00004f5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5C 25160 bytes
SHA-256: 84e12015eec2c4554f73dc8f1b314128616081df360b3a88bc5b9de430c37479
font_01_sfnt_off00008921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 17740 bytes
SHA-256: 14879269a8559ae987a62032ee6d1223d63a0cf7b4214af4691cfda5a28d5ffa

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