Malicious PDF — malware analysis report

Static analysis result for SHA-256 2486b24ad25e2a07…

MALICIOUS

PDF

43.0 KB Created: 2021-06-14 01:40:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f74824c4dfb68a01a3ae97412a140904 SHA-1: 5567f8e1e6fdb3c835379022b310d2089763c2c3 SHA-256: 2486b24ad25e2a07c7cac2388822ca40663d9ca39d6a4463c046087902231602
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading malicious content, as indicated by the SE_FAKE_CAPTCHA heuristic. The embedded URL points to a site offering game hacks, suggesting a social engineering tactic to deliver malware. While no scripts were directly extracted, the presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely to exploit vulnerabilities or deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://netcdn.co/app/431946152/best-roblox-hack-scripts-paste-bin-game-hack
    • https://wald-match.com.tw/upload/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdf
    • https://wald-match.com.tw/upload/files/free-robux-ad_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-save_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/hack-para-obtener-robux-2021_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/robux-hack-no-human-verification_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/roblox-robux-codes-2021_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/2021-free-spins-coin-master-link_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/free-roblox-outfits-2021_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/2021-free-spins-coin-master_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/free-robux-games-on-roblox-2021_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/hack-coin-master-game-download_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/bloxbird-roblox-franais-free_GM431946152.pdf
    • https://wald-match.com.tw/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://wald-match.com.tw/upload/files/minecraft-pe-hack-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ae.bin
06da2979f2e2018ae8529e18141b843943ea951285376c722b739a8274d8f656
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AE 25604 bytes
font_01_sfnt_off0000847f.bin
cc6c46bf02c16fcdc1b4719cc1a7efd6e44ffc31e5bc62dc5681daebd1055174
pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 18736 bytes