Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5acd6720ef46a3c…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 06:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8c86b9b4b5149a745bf791ba460b304b SHA-1: ab89693412e0bb2e722d192b5b51fd0dbe281635 SHA-256: b5acd6720ef46a3ca585e710ca2dd5d13ba78c5060b2d3c71ff35328a7485403
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 0.9796

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/406889139/haktuts-coin-master-free-spins-game-hack PDF link annotation
    • http://lib.unwahas.ac.id/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5208 26136 bytes
SHA-256: 40b19a5c3b414c14a917636f667324765ab8286e980a941bb33e3e01809885dd
font_01_sfnt_off00008e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E14 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000a02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA02D 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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