Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20849a9d9692f90…

MALICIOUS

PDF

44.9 KB Created: 2021-05-14 12:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e216043e66b845c7d55e756fbfc58b4d SHA-1: c53bcfec9b9627af2264f66e1cea886a50fcca5e SHA-256: e20849a9d9692f9043b162c39b6b428bdc5c1f503b42f708cd8e6070b8dd08f9
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 https://netcdn.xyz/app/431946152/free-robux-generator-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://hotelyetihome.com/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coin-master-links_GM406889139.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_off00004c67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C67 25940 bytes
SHA-256: a5055ab63efdb02bd248f23fe49ce2be7587634d4c849a156c33f1eb09cdf31d
font_01_sfnt_off00008947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8947 19556 bytes
SHA-256: 3a60cdb248c638d1e974f8488a9d0c49865e0dbecbd8cc682acbe36144e2e86e

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