Malicious PDF — malware analysis report

Static analysis result for SHA-256 575bde95085663cd…

MALICIOUS

PDF

47.5 KB Created: 2021-05-11 06:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4b4fc32746cb92049a7b5388d737534f SHA-1: 1f49483bba00e51df0ecf9791906c9dcfb30c3dc SHA-256: 575bde95085663cdbaf6e2c6b03fbfcfefa57ebf03c73a45d6c5b1763017e69e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure and an embedded URI pointing to a suspicious URL, suggesting an attempt to trick the user into downloading a payload. The document's content and heuristics indicate a social engineering tactic to bypass user caution. No scripts were extracted, but the presence of external links and the fake CAPTCHA strongly suggest a malicious intent to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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-hack-cheat-engine-game-hack PDF link annotation
    • http://digilib.ivet.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.ivet.ac.id/repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://digilib.ivet.ac.id//repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7C 24884 bytes
SHA-256: e02e1b154b5ed4624a795779493e097fae5ffe380d3f865dd90caea759166d27
font_01_sfnt_off000082d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 18172 bytes
SHA-256: e3f41997ae9b51af751d949b3a003807251391f9a40890f8515a7dcb8e6b4f46
font_03_sfnt_off0000ae35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE35 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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