Malicious PDF — malware analysis report

Static analysis result for SHA-256 6978122e3a2e5a57…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 21:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fe104d751e5da7e524438c26763c45c4 SHA-1: f15483a3f928fe851b3174c92828e7f6c2ce2725 SHA-256: 6978122e3a2e5a57c46e136d25ddb375e4ae2ab359d002880fdd923ad7976067
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to websites offering game hacks and free in-game currency, such as 'como-generar-coin-master-free-spins-game-hack'. The presence of a 'password-protected archive handoff' heuristic suggests the document may be intended to trick users into downloading a password-protected file, likely containing a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/como-generar-coin-master-free-spins-game-hack PDF link annotation
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/comment-avoir-des-robux-avec-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-hack-code_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-link_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_002_off00003337.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3337 22244 bytes
SHA-256: 3f3fb21908d9738348d835fcc0d154f696557f2ab60bc75e0d7a532ca2c7fd95
font_01_sfnt_off000064be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BE 18432 bytes
SHA-256: 74c7be9cac45eb0624d02f0bcdb00c8d8e7b4dc028bb1348c6e4e3a908da1083

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