Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a4deb17259940a…

MALICIOUS

PDF

45.0 KB Created: 2021-06-01 12:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 513bd8ded43c4a2c7f38f1d60b43760a SHA-1: dc47b1ec362c63c9334522516973f072ccc2cee7 SHA-256: 88a4deb17259940a8d01007b018e0e2a36c52bce64623a7c121ede0481c09d86
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It contains an embedded URI pointing to a URL that appears to be related to 'robux hacks', suggesting a lure for gamers. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/mc-the-miner-freee-robux-hack-game-hack
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/earn-free-robux-for-roblox_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-gift-cards-2021-25-8_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-bane-mask-on-roblox_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-top-model-hack_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-hacks-scythe-script_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/robux-hack_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-codes-december-2021_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/robux-com-free_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-catalog-roblox-items_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/71-free-robux_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-tiktok-like_GM835599320.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/real-roblox-robux-hack_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-skins-download-free_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/robux-free-com_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/robux-hacks-2021_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/300-robuxs-for-free_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/how-to-hack-people-roblox-account_GM431946152.pdf
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-hack-com_GM431946152.pdf
    • https://direct-link.net
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b7.bin
876c429b9df75a3df860ca3cd1df6822316a88c207094588a68f9ea918b1b1bb
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B7 25116 bytes
font_01_sfnt_off00008bab.bin
762839317e36ec44d71d01127a992e8fc24d8bf86e894296309129e302358b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAB 18896 bytes