Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a33f7479a9e0e9…

MALICIOUS

PDF

37.2 KB Created: 2021-06-26 00:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 92d3694f588bd4104d641893941bc86b SHA-1: 4933c6e069f858e3d1d1f0650f14f68b1e28fb4f SHA-256: d9a33f7479a9e0e9a48e46a5f84e88c4432d58ded0959cc378bde471225d90e8
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 0.9980

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 http://netcdn.co/app/431946152/free-roblox-clothes-2021-game-hack PDF link annotation
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-hack-a-roblox-server-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-vip-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-hack-roblox-and-get-infinite-health-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/medival-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/2021-hacks-for-robloxs_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-robux-scam-websites_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-get-free-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/gravity-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/hellowen-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-glitches-and-cheats-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/1075-lion-mac-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AB7 22148 bytes
SHA-256: 17d1fe17c4adf86eacea29470e2ef412f2e32ddf29deef4b245f77228b0df031
font_01_sfnt_off00006b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B91 19320 bytes
SHA-256: 86f15129a455bdcbd3c870b88480cf29a3086770cb270fee66b8f95c7ade4570

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