Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9cb317a0af2443…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 03:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f52716ab56a2ecae0d69b139c3f57318 SHA-1: eecdef6c3f90eb9549a02bd1b55498ae145ed8eb SHA-256: 9b9cb317a0af24430c17257e8acf6ed7edb6195670ea81da498db693f03e8dd0
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/how-to-sell-at-shirt-for-free-on-roblox-game-hack PDF link annotation
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/arsenal-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/real-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/robux-link_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/how-to-earn-free-robux_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_off000030d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D0 22916 bytes
SHA-256: 145c9d1591020fe5e5343bc7b9c3125c87d24a8ea52feb8a138d6292c4ccbb9b
font_01_sfnt_off000063a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 19204 bytes
SHA-256: 260a62e31de55185c9b2171d48a787397db16625afa0aca785a646709ae4d2aa

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