Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebde43267c148324…

MALICIOUS

PDF

44.9 KB Created: 2021-05-15 03:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3cb01a37bd76ddd36134e4f2bdf37410 SHA-1: f02af9c44b36e2fcb66ff5824d40fb6b30de532d SHA-256: ebde43267c148324776a91b7c807802b9e3244d5e7ca11ac14473b7ca9cc419d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with a malicious link, likely leading to a download. The presence of multiple URLs associated with game-related lures suggests a common phishing or malware distribution scheme. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/huskybus.com-free-robux-game-hack
    • http://ecotherm-01.eu/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://ecotherm-01.eu/images/free-roblox-toy-codes-not-used_GM431946152.pdf
    • http://ecotherm-01.eu/images/coin-master-70-spin-link-2021_GM406889139.pdf
    • http://ecotherm-01.eu/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://ecotherm-01.eu/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://ecotherm-01.eu/images/free-promo-codes-for-roblox-2021_GM431946152.pdf
    • http://ecotherm-01.eu/images/coin-master-hack-app-2021_GM406889139.pdf
    • http://ecotherm-01.eu/images/free-robux-2021-no-verification_GM431946152.pdf
    • http://ecotherm-01.eu/images/minecraft-classic-free_GM479516143.pdf
    • http://ecotherm-01.eu/images/free-robux-with-no-human-verification_GM431946152.pdf
    • http://ecotherm-01.eu/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://ecotherm-01.eu/images/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://ecotherm-01.eu/images/roblox-free-clothes-hack_GM431946152.pdf
    • http://ecotherm-01.eu/images/free-spin-coin-master-game_GM406889139.pdf
    • http://ecotherm-01.eu/images/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://ecotherm-01.eu/images/coin-master-free-spins-daily_GM406889139.pdf
    • http://ecotherm-01.eu/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://ecotherm-01.eu/images/free-robux-without-verify_GM431946152.pdf
    • http://ecotherm-01.eu/images/how-to-hack-coin-master_GM406889139.pdf
    • http://ecotherm-01.eu/images/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004801.bin
0c3e60f1a7ee6f98079fb3dd692bc9a596816b1cde5d75a5d438d43a6d2b0ad7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4801 25156 bytes
font_01_sfnt_off000081eb.bin
dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 2888 bytes
font_02_sfnt_off00008bbe.bin
6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 18688 bytes

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