Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7875ddd8731989…

MALICIOUS

PDF

51.4 KB Created: 2021-06-11 02:44:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3ece8f75d96d9392c9444d7e1429496c SHA-1: 8284ecf92992acacb0e79d3dc67d2c8cdcdcd45b SHA-256: 2c7875ddd873198958e2e4636f62a3577ed9846f471b659978d78315ba3d15de
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector, disguised with lures related to game hacking. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to direct the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.tw/app/431946152/how-to-hack-roblox-using-nopde-engine-6.4-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-ps3-free-download_GM479516143.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
stream_004_off00005311.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5311 36272 bytes
SHA-256: 07c37a6c85819cbea939bab501a4d890f1d7270ad8eff8db539c5eed09790266
font_01_sfnt_off0000a2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B1 19584 bytes
SHA-256: 858a112b51a78891bf5389fce6cd53a3a3c06cc0b702089e549331fac1806713

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