Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c44427ae66861df…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 10:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: def9b67eb5eb811bce4750f9b88e3ec7 SHA-1: 0992e1e33e87825469be76bf17d416246819f480 SHA-256: 9c44427ae66861df2b332942a01a9353bb78b6deadd48a3a9a7434c780ae6590
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting "free generators" and "game hacks" for popular games. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware or phishing attempts. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-free-spins-link-whatsapp-group-game-hack In PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/commande-lua-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/the-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/roblox-free-lua-executor_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/roblox-free-bodys_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-tshirt-roblox-design_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-font-that-looks-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.espritroue.fr/ckfinder/userfiles/files/free-robux-no-verification-no-download-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_off0000344d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x344D 22968 bytes
SHA-256: 989255bedbcbec7073fe83a4dd79a4c5e61790c34664215f8e245a5f5a505d9e
font_01_sfnt_off000067d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D4 18848 bytes
SHA-256: d5a856b0373f9844b4187bf81cfca0cf23e5c997e9df5b12721b74709945ba8c