Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be79237e51bfdb4…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 05:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fd2798f8429491ad404758a5e179074b SHA-1: c9029cebe3bed183cd03bdf8fd24be2ff1aab4b8 SHA-256: 8be79237e51bfdb4073ea249ca3c4b796a9d1811d9863c9b86280628578ce931
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 0.9864

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.online/app/431946152/krnl-roblox-game-hack PDF link annotation
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/pubg-uc-zam_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-for-ipad-free_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_004_off00004e5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5B 30524 bytes
SHA-256: dec846b3b32f254c6dd04a5663970af12a37d65104841b19cf14e4330b5fbb29
font_01_sfnt_off000091e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E9 17784 bytes
SHA-256: 7fc5638c4d6a7adf3a00de91436b89ff4a884cee4fe7182ef9800dc1feaad259

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