Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f1fadf8e493287…

MALICIOUS

PDF

44.4 KB Created: 2021-06-07 12:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b45560fb561f5087e448a7da4a400c38 SHA-1: 5a20f4875cae0f5a3b041dfde59aef5136bc9070 SHA-256: f6f1fadf8e4932873b8a725cfba9005607f456be30a1a86c67b85f2105dec87f
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It contains an embedded URI pointing to a suspicious URL, likely intended to host further malicious content or phishing pages. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-long-shold-the-account-stealing-hack-on-roblox-last-game-hack PDF link annotation
    • http://ipdrs.org/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://ipdrs.org/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/hhack-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ipdrs.org/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://ipdrs.org/images/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB9 25292 bytes
SHA-256: 6b0c4af0be569674c0e37d15c1428ab26537256abc6f5af5f664871b45c883a8
font_01_sfnt_off000087b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B9 19336 bytes
SHA-256: 4b83ddf11b9bca47f09f03531b905f7d3779fc2122cdfb34fca6476a384af005

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