Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf58627f9465bdc0…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 12:48:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 064d1264ac84d2ec859cdead31ce045e SHA-1: de71f6adf06afbdecd82aaa41f3aedd6fffaafb3 SHA-256: bf58627f9465bdc0a8539d6947b0be4b2c14328e1e45dcae05a42de393e70ef2
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA lure to entice users to click on embedded URLs, such as https://netcdn.tw/app/431946152/roblox-hacks-2021-jailbreak-game-hack. This behavior is indicative of a phishing or malware distribution attempt, likely leading to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious.

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/roblox-hacks-2021-jailbreak-game-hack
    • http://immo360grad.com/images/free-spins-coin-master-links_GM406889139.pdf
    • http://immo360grad.com/images/moonactive-coin-master_GM406889139.pdf
    • http://immo360grad.com/images/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://immo360grad.com/images/rbx-robux_GM431946152.pdf
    • http://immo360grad.com/images/daily-free-spin-and-coin_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-free-spins-haktuts_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://immo360grad.com/images/free-robux-groups-2021_GM431946152.pdf
    • http://immo360grad.com/images/coin-master-hack-no-verification_GM406889139.pdf
    • http://immo360grad.com/images/minecraft-apk-114_GM479516143.pdf
    • http://immo360grad.com/images/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://immo360grad.com/images/coin-master-hack-ios-apk_GM406889139.pdf
    • http://immo360grad.com/images/how-to-get-unlimited-robux_GM431946152.pdf
    • http://immo360grad.com/images/robux-apk_GM431946152.pdf
    • http://immo360grad.com/images/coin-master-card-link-free_GM406889139.pdf
    • http://immo360grad.com/images/play-minecraft-for-free_GM479516143.pdf
    • http://immo360grad.com/images/free-vip-server-roblox_GM431946152.pdf
    • http://immo360grad.com/images/hack-para-roblox-dragon-ball-rage_GM431946152.pdf
    • http://immo360grad.com/images/free-roblox-promo-codes-2021-february_GM431946152.pdf
    • http://immo360grad.com/images/free-op-minecraft-servers_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005200.bin
ec25e99889249f4a6b21893f2e8b41a5144e24b8255b618834c3a0468dd9666f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5200 24372 bytes
font_01_sfnt_off000089e4.bin
091a5d978136c621f9945f38ea4edaff0f79b25f559dd7e98b9868cde0c6abe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 18868 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.