Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e6dcd89f72846…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 00:08:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 90abfce296c744678334718292726b25 SHA-1: 4b0f20b5a85510d83c3b4e2a9d1b94d5be220302 SHA-256: 3d9e6dcd89f72846a480ee977aa444bb33865f2f25fbadee3750c27371c9f620
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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-spin-free-game-hack PDF link annotation
    • http://abst-brandschutztechnik.com/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://abst-brandschutztechnik.com/images/how-to-get-roebucks-on-roblox_GM431946152.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_off000048f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F1 24700 bytes
SHA-256: 22f614c6633ef81b3e00ba7c9e0931b5bcc4466790bf4bf00d9e9c0fb4d55773
font_01_sfnt_off000081a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A0 17884 bytes
SHA-256: f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184

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