Malicious PDF — malware analysis report

Static analysis result for SHA-256 891f90e548949349…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 19:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a506c2ec7f26a472a725c257d27ed78b SHA-1: 0904120d56cd9bdaecabe07ae4342dda0b5fc4ef SHA-256: 891f90e54894934916bb1840a7f9f00d74b43b372880450c9ede4142a9858c1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to trick the user into downloading an application from the provided URL. The embedded URL and the document body content strongly suggest a lure for game-related hacks or cheats. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate a potential for further malicious activity, such as downloading and executing 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 https://netcdn.xyz/app/406889139/coin-master-app-hacks-game-hack PDF link annotation
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/robux-prices_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A22 25020 bytes
SHA-256: ca02c3e3030b6234eccd7220528aee66a584873d70e440ed91f5dfb965ce7c8e
font_01_sfnt_off00008415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 17892 bytes
SHA-256: 38569bedbe5996f2827c101678e23308efeb8581fe2a57cd3cb5ddc3bbed0d22

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