Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d575daa28baaba…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 12:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 65c7ab00a313c8137773392f0e6d400c SHA-1: fcc314fcc4c8e1251e6679d41560f312632f9882 SHA-256: b3d575daa28baabae6c7745ea12ff8e87c2f9440690510bd238c1efa82984072
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary link, http://netcdn.co/app/431946152/free-robux-roblox-no-human-verification-game-hack, is identified as a malicious redirector. The document body and numerous extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/free-robux-roblox-no-human-verification-game-hack In PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-to-get-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-medieval-hood-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-roblox-game-pass_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/free-roblox-robx_GM431946152.pdfIn PDF document text
    • https://elearning.manicbatam.com/__statics/gudangsoal/files/how-do-yoy-get-robux-for-free_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
font_00_sfnt_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 22528 bytes
SHA-256: ea69f328f145c398af8c3c54752bd042776091ded4b7b99314169af7e3bcdea7
font_01_sfnt_off000062de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DE 19408 bytes
SHA-256: 5bb6ba3e8498de6cb5fcebfcd37e444888552e76918cff07fc7c5951d229e8ed

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