Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cece0d809799e1…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 13:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: efcb29ece169aa84eab28e8cc2c6aa95 SHA-1: 86d7208458b6ffa40295a4967b085709ee2b27fc SHA-256: a9cece0d809799e136cef006bcfb47efdbad67a84c6f44c3e7840a1ab76fa7d5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that point to known malicious redirector infrastructure, specifically designed to lure users into downloading potentially harmful files related to games like Robux and Coin Master. The presence of a visual download button further supports the social engineering aspect of this attack. While no scripts were explicitly extracted, the PDF's structure and the malicious URLs indicate a clear intent to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://dshikr.ru/images/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://krnl.rocksIn 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_003_off000048a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A3 24100 bytes
SHA-256: 983b5544d342c8e392d3636dffa1c9796279a2e17c77bbdaf0069bc90b4ae988
font_01_sfnt_off00007fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 18688 bytes
SHA-256: 6988f73f4b0746331af176c61d8a6d12afd54d9d4021c1ba8a7576897a1c52a2