Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3ea858fadb69ae…

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 01:35:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef4efc9d9a96eec3a43e3575cb84ad49 SHA-1: 517372ae494319b3b1d7ac88b4f607704c7ff80e SHA-256: ad3ea858fadb69aefe926e01f84f54a391ecabcdc9af35e6397b8625880a3383
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URLs, such as 'https://netcdn.xyz/app/431946152/free-robux-live-game-hack', which likely lead to malicious content or further downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-live-game-hack PDF link annotation
    • http://kishplus.ir/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://kishplus.ir/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://kishplus.ir/images/coin-master-free-spins-link-2021_GM406889139.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
stream_003_off000049ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CA 28980 bytes
SHA-256: b4072cb98f1bf5df87defc9410029aef9a2742bcda597b336056f782308340d5
font_01_sfnt_off00008ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 18248 bytes
SHA-256: 2e5a72f8344bcf9b425e9fd022f0a9c5c2029812f1a4b00ba9f2a8ee504eb572

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