Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59f82ba811a9150…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 11:01:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 28f9ee55fc55762e9e8664f904ed0ca4 SHA-1: 486b30515bc303e8bfe4e0b30de854c8f25a0d9e SHA-256: b59f82ba811a91506555f6d245d3bf18c9c47ed039de494e210e17bc0d9ae0c8
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 0.9969

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/431946152/get-free-robux-today-game-hack PDF link annotation
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/minecraft_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-buy-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
stream_003_off00004c54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C54 26196 bytes
SHA-256: 86921f5a38c920708e7d93d7c57e3d7f32659a62643279c37d5d99c895513ff1
font_01_sfnt_off0000885d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885D 18700 bytes
SHA-256: b843f73b4bd8c826713a813afccd99a06030f2bdc38aa1865c4ca07f2f1b4e6b

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