Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ebe41b97eb6166…

MALICIOUS

PDF

47.2 KB Created: 2021-05-16 13:46:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6776cbc0923286bb6aa891273946c10c SHA-1: e0329d619806f057ea0df4ee2a3e4bea082a0f36 SHA-256: 11ebe41b97eb6166874ff6df5870d6afcf2892d26331ab255d3ce6d454b8194e
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button lure, directing users to a URL associated with free virtual currency scams. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack, is likely the primary destination for this social engineering attempt. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/free-robux-no-human-verification-or-survey-or-download-2021-game-hack
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-cards-in-coin-master_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-hack_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d79.bin
743f699309bb0f070654a703f8809143056309f0300d2afdd76febdf36f9c72a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D79 29100 bytes
font_01_sfnt_off000090bc.bin
66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90BC 20136 bytes

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