Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c275f1d37566786…

MALICIOUS

PDF

38.7 KB Created: 2021-05-13 14:06:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d267f84bd6f744daf76af0810ac8ffb3 SHA-1: aa8f47e19732ffa42faf422ecfd46a480c8caeb6 SHA-256: 3c275f1d375667861f072b8535b092c076b8717813a6b2039c1d83c7dd5f1e82
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking a malicious link. This link, 'https://netcdn.xyz/app/406889139/free-coins--game-hack', likely leads to the download of a second-stage payload. The document's content and embedded URLs suggest a scam related to free in-game currency or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8744

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/free-coins--game-hack
    • https://www.gotsolution.se/uploaded_files/userfiles/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-spins-link-fb_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000037a4.bin
b1f63fd9b031b54b79244bf5f17e4b0ad4f0c5d218e975687398617b62f20972		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37A4 24364 bytes
font_01_sfnt_off00006e67.bin
d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 2868 bytes
font_02_sfnt_off00007851.bin
4587a0da3d318d3aab2e4d3a2e17e88175961c64bd2fb3ac3dbf4933656e475a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7851 17380 bytes

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