Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed771c8d53886a7…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 14:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1bd78297c9f8bfbbd5bca45dae4c1d1d SHA-1: c7f5a0f30bcac1e72972c43ab8d813705b9dc327 SHA-256: 4ed771c8d53886a70f5a6745524d41546590d8b53bb15d42df793cc86f2d2a03
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files promising free in-game currency or hacks for popular games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. The document body and extracted URLs strongly suggest a scam or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-robux-codes-no-verification-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/10k-likes-on-tiktok-free_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-drivers-upgrade-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-heroes-online-free-access_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-do-i-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-accounts-with-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/robux-games_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/hack-client_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/mount-everest-roblox-free-rescue-gamepass_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-free-script-injector-2021-windows-10_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-simulator-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-coin-master-game-apk-download_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
font_00_sfnt_off000030ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AD 22188 bytes
SHA-256: a88a3906b81210f3cc80ee31d191ea82fab0ac84ea48e71113b2d7a201aa4361
font_01_sfnt_off00006226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 19248 bytes
SHA-256: 7c118f3686e549365112848f1cfe4604feffe3fb38e17c4b52e8f2bf9bb9aa8d

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