Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b565e36995e61e…

MALICIOUS

PDF

35.0 KB Created: 2021-07-02 07:28:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9232fd189a6198bcc6f9e7922aaafa35 SHA-1: d750fb750fc8a0398cd10e0630b670e6b14e42fa SHA-256: 78b565e36995e61e0ee720b82f6948f3481e9f6dca44f3595e0a7c49ec4aa385
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/roblox-song-i-want-to-break-free-game-hack.
  • 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/roblox-song-i-want-to-break-free-game-hack PDF link annotation
    • http://www.alrashed-alsaleh.com/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-see-chegg-answers-free-tiktok_GM835599320.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-stuff-on-roblox-without-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-robux-2021_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_off0000315c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315C 22448 bytes
SHA-256: fb6da50b8852274f915ce27786d344839c53acf007f2c6e2d93ca5f9fb3f4f74
font_01_sfnt_off00006345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6345 19120 bytes
SHA-256: 2dfad074b6fef041061c133b3b634933a1cd0e09478d3aeefdb1e58be5db98c1

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