Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01f639f7f30f108…

MALICIOUS

PDF

46.8 KB Created: 2021-05-10 21:00:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a672dae11a7ab7cc1b29cb090d9c50b4 SHA-1: f1cbab0caa803cb8f118e9e4004197d0916220f3 SHA-256: d01f639f7f30f108d8157ccc339b9207546c1b52f368732782d93d38b42e75af
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically promoting 'free Robux' and game hacks. The document body and extracted URLs reinforce this theme, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/huskybucks.com-free-robux-game-hack In PDF document text
    • http://sbm-nn.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/rbx-earn_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-online-hack-2021_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_off00004903.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4903 27452 bytes
SHA-256: 2be5e4502a2c1d7fdf2ee9ba33eea12e3c97d1c16e9638b658d496ec7570e592
font_01_sfnt_off000089b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 18688 bytes
SHA-256: 6988f73f4b0746331af176c61d8a6d12afd54d9d4021c1ba8a7576897a1c52a2