Malicious PDF — malware analysis report

Static analysis result for SHA-256 2581e4e5e606734c…

MALICIOUS

PDF

46.3 KB Created: 2021-05-15 16:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5d679299ae27cc5fa6ff19813be89f1 SHA-1: 6e6356bf042126d445902869335f9d290e37380f SHA-256: 2581e4e5e606734c2d6d8033cc112f65bde25ef029834c5e12590caed23e67f6
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 0.8696

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/earn-free-robux-for-roblox-game-hack PDF link annotation
    • http://yucaboats.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://yucaboats.com/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://yucaboats.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://yucaboats.com/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://yucaboats.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://yucaboats.com/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://yucaboats.com/images/orewards-com-free-robux_GM431946152.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_003_off00004ab8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB8 26116 bytes
SHA-256: 9e842e3b2367c768a00b0c5a5811062fd35da8e1df3a9a36dfdd3d496d7d6798
font_01_sfnt_off00008833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8833 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off00009281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9281 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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