Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f17d2a81e077817…

MALICIOUS

PDF

46.2 KB Created: 2021-05-16 07:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e40a1fd18ce3f5fcfbe6005d549f1f61 SHA-1: 5828279faa0a9268fd2c92a2bccb87587a76e88c SHA-256: 0f17d2a81e0778177d58631ee09ae47be60c842b56a5cc5fe3de4251300ff31c
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as PDF files and appear to be part of a link farm. The primary URL, 'https://netcdn.xyz/app/431946152/roblox-studio-free-robux-game-hack', along with others hosted on 'verstricktundzugenaeht.com', suggests a lure for users seeking game cheats or hacks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/431946152/roblox-studio-free-robux-game-hack
    • https://verstricktundzugenaeht.com/images/roblox-robux_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-32-hack-apk-download_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/free-robux-com-roblox_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/how-to-get-free-roblox_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/coinmaster-spin-ml-link_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • https://verstricktundzugenaeht.com/images/free-card-collection-in-coin-master_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-free-spins-a2z-help_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/cool-free-minecraft-skins_GM479516143.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/is-minecraft-free_GM479516143.pdf
    • https://verstricktundzugenaeht.com/images/hack-coin-master-ios_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/roblox-games-with-free-radio_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/free-roblox-shirt-templates_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9b.bin
1ad3fed32228e11e62e681d77af1216ab2ccbb6e6fb124ce16bb8de987f253e7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9B 25292 bytes
font_01_sfnt_off0000851d.bin
1dd230e0edda4f5ae15d752c213ed6424840ede9eeceb94def380517ab7f8768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851D 3516 bytes
font_02_sfnt_off00009186.bin
5fdc582f30145a96e28329e80bd45567e2bf6a1df475cf6931e13f95db6331fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9186 18484 bytes

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