Malicious PDF — malware analysis report

Static analysis result for SHA-256 241b08808842e85c…

MALICIOUS

PDF

43.2 KB Created: 2021-05-17 09:44:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 330ac193b2497f2c4953c81d91ca4f64 SHA-1: 91d5bd51d5dd69007b52abb3232b1b355fc2bf40 SHA-256: 241b08808842e85c431e6086c61bc495f6ac0ff589d12cac548356d81d5e6957
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/free-robux-real-game-hack PDF link annotation
    • https://kojak-group.com/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000484f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x484F 26968 bytes
SHA-256: 1ea198217f7a838ba42f9efc08a36d85253b75d7ab86229d7cbcf3447bde3723
font_01_sfnt_off00008675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8675 18316 bytes
SHA-256: 0bff543ee19f4ca1641aaad3399cdc0a52c610caf2abd08cd8655404047fbeff

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