Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7cb1fe6de9e5b2…

MALICIOUS

PDF

33.8 KB Created: 2021-07-02 07:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8f95a85b45dfb4fb05fe57673efcf106 SHA-1: e32771d92aa45262fade61433ac51b85a9a889b1 SHA-256: 1d7cb1fe6de9e5b2b643f0370d3af7348e2e50ada3a6ab556003fc2d323c8fea
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a direct URL to external resources, masquerading as guides for hacking popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs points towards an attempt to redirect users to malicious sites for downloading payloads or engaging in scams. No scripts were extracted, but the overall structure and content strongly suggest a phishing or malware distribution 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.co/app/431946152/how-to-hack-roblox-2021-mac-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-robux-with-no-downloads_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-times-in-roblox-games_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-how-to-get-hacked-account-back_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-verification-2021-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robuxs-app_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-casdg9-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-avatar-free-boy_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-face-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-v3rmillion-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-blog_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_off00002d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D81 21928 bytes
SHA-256: 334132a8bac65ecb4f7612a63d9bc63ceb9b53a9876a4190d962ebb9a2befc0c
font_01_sfnt_off00005ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDB 19416 bytes
SHA-256: 1fcb2a412bbbf1c356faa0243bf8d3554267a9f7ff9e2c51bf414f5f27c7516e

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