Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca73d08fc32663a1…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 06:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0526409f33b06ce94db42c05a361444c SHA-1: bb84cf8195a0453a0f2add8c78623370aaa5b758 SHA-256: ca73d08fc32663a13bd21a57cb59e16c2ab8592211b18e11ce61178b4b2b3c4a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links and a visual download button, directing users to potentially malicious infrastructure. The ML classifier also flagged this PDF with high confidence. The primary URL, https://netcdn.xyz/app/406889139/coin-master-mod-version-free-download-v3.4.4-game-hack, is associated with known malicious redirector infrastructure, indicating an attempt to deliver a payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/coin-master-mod-version-free-download-v3.4.4-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E16 25288 bytes
SHA-256: 63f2ca27d69ef9ec50cd011d88f896e38f4850a3fd1e444af75ed484f41ae502
font_01_sfnt_off000086b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B4 2880 bytes
SHA-256: 93b508a52e047ef4bff1d7d250d9aefd838e5a176ceb5e9be36ada0f8d333e07
font_02_sfnt_off000090a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A2 18728 bytes
SHA-256: ad22a82d8b3233edb38f402cd3e5013c6375fd48aabf823ea78d744f504abdc7

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