Malicious PDF — malware analysis report

Static analysis result for SHA-256 08da1cde34a5a140…

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 12:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c4d792cec181610ebab5428c38221f73 SHA-1: 64dfdc0fa8370a4db4ea7d9ef935f541f5bbac96 SHA-256: 08da1cde34a5a140612b07d8307b0a52f8a2b9f886aeee78c1c8ceb4fa2b4324
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL leads to a website offering 'Coin Master Daily Free Spins', a typical lure for scams. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it may exploit vulnerabilities or embed malicious JavaScript to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

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/coin-master-daily-free-spins-2021-game-hack
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/bad-minecraft-free_GM479516143.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-link_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/pokemon-go-free-bundle_GM1094591345.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-tiktok-followers_GM835599320.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/huskybuckscom-free-robux_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/pokemon-go-free-download-hack_GM1094591345.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-stuff-links_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-robux-generator_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/robux-websites-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/real-roblox_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507c.bin
44a06f5fa192b2363d47a1886065913b7ff4700e4f596496081b70ec402ec855		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507C 24620 bytes
font_01_sfnt_off000088ab.bin
6a4891da4f8b73c02e22ecd6fa566d6bb4f5f2d5575b30a343f3d3c5e0919267		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 4028 bytes
font_02_sfnt_off0000964e.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 2788 bytes
font_03_sfnt_off0000a03e.bin
0e09573a858265cfc65c534eb28458a66078312e2bd7bae94317e03ea41fcd19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA03E 18708 bytes

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