Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e67f25a1b2099f8…

MALICIOUS

PDF

44.2 KB Created: 2021-06-09 11:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 45e08cbd9602fd30d4e9370f3ac2f291 SHA-1: 11f224414987f6188dce5042279544beedff0070 SHA-256: 2e67f25a1b2099f8f33557d21d23df1e82926528f7fc8a8587b7d486facc37fc
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button to trick users into downloading a malicious file, likely a second-stage payload. The embedded URL https://netcdn.tw/app/431946152/free-robux-hack-download-game-hack is a primary indicator of this malicious workflow. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes.

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.tw/app/431946152/free-robux-hack-download-game-hack PDF link annotation
    • http://io24.com.ar/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-promo-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-exploit-project-pokemon-site-youtubecom_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/ex7-roblox-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/counter-blox-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-how-to-get-free-gear-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-paintball-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-06-accounts-roblox_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_004_off00004e0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0E 25016 bytes
SHA-256: 281546a1de295145ef4d5944935eaf8da157a934496bb83b13508f2ec38ec1c0
font_01_sfnt_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 18992 bytes
SHA-256: 03852e13676948400ecedff327bff36da0dc8012652e1594bf2cc6aee435bb0c

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