Malicious PDF — malware analysis report

Static analysis result for SHA-256 9505d7af99d771f4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:11:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 65caaf071bed9b4a5a86d2e585df61e9 SHA-1: f60cbe1bfb8eb0a4aec90fcf8cf2cdf627d20e73 SHA-256: 9505d7af99d771f4861903266b31cee10f8858ca74b9f6ae44e0328e99f986a9
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 http://netcdn.tw/app/406889139/coinmaster-spin-ml-free-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-robux-robux-free-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/alsotheking-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-website_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-scam_GM431946152.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
font_00_sfnt_off00003053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3053 22728 bytes
SHA-256: c073f8cd5e4af13e11c55aec53db3a1d7b33d3bb3225d33c27bcd492ae836898
font_01_sfnt_off00006304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6304 18508 bytes
SHA-256: 5a873bb0356ec19a5dc0adacee915e4f1795f488777b3765821418f1979d1dc0

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