Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edf5944ff8b502b…

MALICIOUS

PDF

33.9 KB Created: 2021-06-24 23:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49109049c8eba46bc7712500ffa33364 SHA-1: d5df112b874212c6f697ee1eda8ec48c00e046b0 SHA-256: 5edf5944ff8b502b68951f3a5d4849962378dec87f0548b2a7c5351f00482fe0
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are structured as a link farm for SEO purposes, pointing to various game-related hacks and cheats. The primary URL, http://netcdn.co/app/431946152/hacked-roblox-faces-id-game-hack, suggests a lure for users seeking exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hacked-roblox-faces-id-game-hack
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-ios-download-2021_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/mcpe-116_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-t-shirt-free_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-promo-codes-2021-april_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-32-hack-apk-download_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/www-coin-master-hack_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/do-you-want-free-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/robux-hack-free-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/can-i-play-minecraft-for-free_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/tiradas-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-20-free-spins-link-today_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-spins-hacktman_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-do-u-hack-roblox_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5b.bin
3cb20aab02c9bcc09faf1c6758784c06168de3be467acd8845b150e4819bc931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 21848 bytes
font_01_sfnt_off00005f8b.bin
d44b6a3a20e613a09ebb073bddc967add572155310769ba20e0d6ccd27bc2e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 18996 bytes

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