Malicious PDF — malware analysis report

Static analysis result for SHA-256 8821dc2d985196e7…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 12:59:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 484c05fd9aa18d4667bade3607297455 SHA-1: a67e7ca35ec1ee8bd17f35343124ac878902a056 SHA-256: 8821dc2d985196e7b89457373236011b2dc7dd8fda400cb077f1f4e22cc6e7e5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "Free Robux Hack". The presence of a visual download button and the ML classifier's high confidence score further indicate malicious intent. The document likely serves as a lure to direct users to potentially harmful websites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-robux-hack.org-game-hack In PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/pubg-uc-10-rs_GM1330123889.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://sisomdethospital.com/ckfinder/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000513e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513E 26080 bytes
SHA-256: 22140ffeb911f0d558cb79779b806005d3d2596693890839b7f9ac112042dbb7
font_01_sfnt_off00008c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9C 18764 bytes
SHA-256: a56ce7e9cc1964a27437135663b373a4b1e0976f5b2b207113181468d077c66f

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