Malicious PDF — malware analysis report

Static analysis result for SHA-256 084fb99c2f9384e2…

MALICIOUS

PDF

35.7 KB Created: 2021-06-18 05:53:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5bb9ff4b9c39ad29b0a9c8108e3a7349 SHA-1: ded6eba6b6b234703c5e331d16db4c3f9cd38b55 SHA-256: 084fb99c2f9384e240cbfbabebf51dd47f85bd6cb229019fcb7600199eab8f7b
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.co/app/431946152/how-do-u-get-free-robux-code-game-hack PDF link annotation
    • http://www.valenciamaids.com/userfiles/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-hack-roblox-with-lucky-patcher-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-url-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000033e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E4 22272 bytes
SHA-256: 48f2397e27d3fbd884e8a043768d34ff819b2c4da6cbf81af0a4c79258d15bb8
font_01_sfnt_off00006581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 19328 bytes
SHA-256: e56bfb5fa984d804ff8549c5d2a59b47b66393d32e4f401e2cc59486782da4a0

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