Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0cfb479658daf4…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 18:04:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 532e18f742fbf165392459d8e6ba4d80 SHA-1: 883cca1a90c6599002c82798ed7405df6519803e SHA-256: eb0cfb479658daf4943f573f7d45e456eb8895126b05c34a984a14206ba58912
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, designed to trick users into downloading a malicious application. It embeds external URLs that likely host the payload. The ML classifier also flagged this PDF as malicious with high confidence.

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-free-attack-hack-game-hack
    • http://gazelletr.com/userfiles/files/coin-master-apk-hack-2021_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/how-to-coin-master-hack_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/free-robux-stream_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/i-want-robux_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/minecraft-modded-client_GM479516143.pdf
    • http://gazelletr.com/userfiles/files/minecraft-bedrock-for-free_GM479516143.pdf
    • http://gazelletr.com/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/coin-master-hack-app-2021_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/free-roblox-gift-card_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-daily_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/coin-master-spin-hack_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://gazelletr.com/userfiles/files/roblox-assassin_GM431946152.pdf
    • http://gazelletr.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba2.bin
f9fe11af179ba9201cf9d91a7213c4349974b97fbedbb295b1cb79b1adce3a3e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA2 25492 bytes
font_01_sfnt_off0000852f.bin
64cbdad4b5c3b3a37694725247404ca4617731c1cde232b85c3c0be6b95e7409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 17880 bytes

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