Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded8cc161778641f…

MALICIOUS

PDF

842.5 KB Created: 2016-12-24 12:15:42 UTC Authoring application: RAD PDF (via RAD PDF 2.36.7.1 - http://www.radpdf.com) First seen: 2021-05-29
MD5: 2d03e5f6f283a33e88dc8f9d7c968f32 SHA-1: a20b0d30b89e46e2effdebfdc1e11ebaa9570650 SHA-256: ded8cc161778641f61c0d7622b1e2eccb504960217993adfa41711be5b1b201e
82 Risk Score

Malware Insights

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

The PDF document contains multiple invisible and repeated links designed to trick the user into downloading a malicious executable file. The primary lure points to a Dropbox URL hosting a file named 'Scan-27827827881992882.scr', which is likely a second-stage payload. The use of URL shorteners further obfuscates the malicious destination.

Machine Learning

  • Nyx PDF Classifier clean score 0.0002

Heuristics 3

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • Clickable URI uses URL shortener medium PDF_URL_SHORTENER_URI
    PDF contains a clickable HTTP(S) action whose destination is a URL shortener. This hides the final landing page from static review and is common in phishing redirect PDFs.
  • 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://www.dropbox.com/s/ot0e1puk3k0xr4e/Scan-27827827881992882.scr?dl=1 In PDF document text
    • https://www.dropbox.com/s/2lyaru9j0pgjp9h/Doc-36737823878834993993.scr?dl=1In PDF document text
    • https://www.dropbox.com/s/sqls0rbepfkdr6k/SCAN_4567889901.scr?dl=1In PDF document text
    • http://bambastore.com/website/file/192.168.43.73/eserese/chibuu/indexychaibu.htmlIn PDF document text
    • https://sajiye.net/t-online/T-online/Telekom.htmIn PDF document text
    • http://www.radpdf.comIn PDF document text
    • http://www.radpdf.com)/Author(Mho)/Creator(RADIn PDF document text
    • http://www.dynaforms.comIn PDF document text
    • http://ow.ly/do8C307NIfuIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text

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