Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca98dceee457a3…

MALICIOUS

PDF

35.2 KB Created: 2021-07-02 09:04:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 11a2156ffa7378c8fe547a823b2d708a SHA-1: c74b769bd034f67967618879b4c4d031930b0f2d SHA-256: c4ca98dceee457a33d4a2ab904c372e42348ff4ddc1659ba588cc88c842b730b
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-robux-working-game-hack PDF link annotation
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://elearning.min6blitar.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-2021_GM479516143.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_002_off0000302a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x302A 22988 bytes
SHA-256: dff90900f362a7d2a794eeedf598694f6fad32fb23c29447ab02a4a15fc425c4
font_01_sfnt_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 19204 bytes
SHA-256: ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e

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