Malicious PDF — malware analysis report

Static analysis result for SHA-256 44adbd3c939bbd6d…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 06:21:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e049989a44ec564e693d1ebc5f273289 SHA-1: 310d12a26f22308b846ded38f674819866a2f5ac SHA-256: 44adbd3c939bbd6dc85729d63d06389d8b9d2035202dad17e1a6202d5a58072b
82 Risk Score

Malware Insights

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

The document employs a fake CAPTCHA lure to deceive users into clicking a malicious link, which is a common social engineering tactic. The embedded URL points to a site offering a game hack, further supporting the phishing or scam nature of the document. No scripts were extracted, but the presence of a fake CAPTCHA and external links indicates a high likelihood of user interaction leading to a malicious download or redirect.

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.online/app/406889139/free-coin-master-cards-game-hack
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-building-hacks_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-18-9-hacked-client_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/free-minecraft-for-kids_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-codes-2021-real_GM431946152.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/free-robux-exe_GM431946152.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/get-more-robux_GM431946152.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/50-free-spins-coin-master_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/free-minecraft-skins-pc_GM479516143.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://itamleek.net/uploaded_files/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005351.bin
d975d849864259df9fd9145a0c027e64a38ff441bbb8e487d1212e66d4fac15d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5351 24852 bytes
font_01_sfnt_off00008b98.bin
34dd8c80f69d0f68a5b5993274c8f1bdeef3254478921523cc39dd8566b84a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B98 17884 bytes

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