Malicious PDF — malware analysis report

Static analysis result for SHA-256 9490b3b9ca88dd77…

MALICIOUS

PDF

37.3 KB Created: 2020-04-11 08:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac582c90146df63f0ade5f37ce84d829 SHA-1: 500445975fec4a442eefc38f44e26f0709343212 SHA-256: 9490b3b9ca88dd77213bec85debd5c036ebaa0bb922b7a657a4aa551f6dae2e8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs a link farm technique, embedding numerous external links disguised as search results for popular music downloads. The primary goal appears to be directing users to a network of potentially malicious websites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://pameladirnberger.com/uploads/1/3/0/5/130589420/130589420.html#arijit+singh+all+songs+download+audi
    • http://adreamed.net/uploads/1/3/1/4/131482859/telamex.pdf
    • http://mimishomecleaning.com/uploads/1/3/0/7/130740117/e5187daf7cd9d.pdf
    • http://ofssilentauction.org/uploads/1/3/0/5/130546294/d0207d1cc736.pdf
    • http://fredthomasart.com/uploads/1/3/0/2/130287971/rugavabole.pdf
    • http://conorfirth.com/uploads/1/3/1/3/131380618/kuguvigazogatubezade.pdf
    • http://dynamichealthsystem.com/uploads/1/3/0/4/130435590/fawujelojele.pdf
    • http://collisconstruction.com/uploads/1/3/1/3/131383497/lenaratovigapeki.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006982.bin
89f4e7b513dce9e14bdd49f9c407541cd440b3f039b03b7d0a138b8d5a57bbed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6982 8332 bytes

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