Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6cd23dcd0803b12…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 01:42:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ac889d3e01d913a5f91ccc54ae2e3613 SHA-1: c7c61cae8eb2655188b817dd9b182e4274d90635 SHA-256: b6cd23dcd0803b1259bc62c3dd570ab6a4a8ca1f6124f89a678e3cdd83101791
100 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to a known malicious redirector infrastructure, specifically promoting a "Coin Master Hack Mod Apk". The presence of a visual download button and the ML classifier's high confidence score further indicate malicious intent. The document's content and linked URLs suggest a social engineering lure to trick users into downloading malware disguised as a game hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-hack-mod-apk-3.5-8-game-hack In PDF document text
    • http://hk-kan.org/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/hack-download_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-free-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/login-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-online-hack-tool_GM406889139.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_003_off000047ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47EC 27448 bytes
SHA-256: 0da32a8bf7da8923b48f80019cc8ad3692c1505672d99e225fc7fa85b015673e
font_01_sfnt_off000085ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CE 18652 bytes
SHA-256: b0e55ddf4991cb276b5bfbc4cc9264f1bb1539d109e205f1d0e17b9dcba1a9e4

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