Malicious PDF — malware analysis report

Static analysis result for SHA-256 6894711ba231bc38…

MALICIOUS

PDF

42.3 KB Created: 2021-06-14 00:52:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 09c064a5f04f64ce37020c0e447dd1ab SHA-1: c07ae50a549b5271385dfaef6e72646b556c1482 SHA-256: 6894711ba231bc3809d9d4a5ea2e6c19b4f647e12a5e14452d46774723ac7b81
82 Risk Score

Malware Insights

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

The PDF document employs a social engineering lure, presenting itself as a game hack or generator to trick users into downloading malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent. The document body and extracted URLs suggest the lure is related to popular games like Roblox and Coin Master, aiming to exploit user interest for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.co/app/431946152/when-does-john-doe-hack-roblox-game-hack PDF link annotation
    • https://cleansui-home.com.tw/image/data/files/roblox-free-objet-hack_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/pubg-uc-and-skins-smm-panel_GM1330123889.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/tiktok-free-open_GM835599320.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-use-scripts-in-roblox-hack_GM431946152.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_off0000496d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496D 25072 bytes
SHA-256: 5e5f927c0486feb69217885dccdc43df6312aade1069d8ca09fd55181b15bdba
font_01_sfnt_off00008152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8152 18880 bytes
SHA-256: fbbcf1e809789a36332613aabb0f8d0fb48863b4811049b36c31b454148350db

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