Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde659d39334e62f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 05:31:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 54480fe19a841a6731d72da623e7dc15 SHA-1: b9e4ebda23edd82cb550e73bc891cc77635a0c49 SHA-256: bde659d39334e62fce724792decfa8d1c65ae828858ad7fc757429b4fdbf7021
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text promoting hacks and free currency for popular games, directing users to download applications from suspicious URLs. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one of the embedded URLs leads to known malicious infrastructure. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/431946152/roblox-hack-999.999-robux-android-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-google-free-kostume_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-giver-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-2-step-verification-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-cheats-phone_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-website_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/ways-to-get-free-robux_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_off00002d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8C 22844 bytes
SHA-256: 3bb29bc1e23f376a9e6cf3989d6fbcd9efcdd6f9b9100b9126363daf173b0ae6
font_01_sfnt_off0000608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608E 19320 bytes
SHA-256: 12a986d635597e05eb291d6bf1abc5f5a54876b40983856b9b4d26b9a0edc7f1

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