Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f293c910d6d008c…

MALICIOUS

PDF

41.0 KB Created: 2020-05-21 23:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0631c4ae1cb2480bd3cec7d63f8d3f32 SHA-1: 16baca649124ab39a390fc6545384f98e1ad6c30 SHA-256: 3f293c910d6d008ccd86e3eab71e5e4fb778600cd288d58be49ce012c0dcfcfe
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains seemingly innocuous text related to 'Barbie dreamhouse tv show cast' which may serve as a lure to disguise the malicious intent of redirecting users to potentially harmful content via the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://coolcaribbeanvacations.voyagerwebsites.com/uploads/1/3/1/4/131437680/131437680.html#barbie+dreamhouse+tv+show+cast
    • http://freestyleartclasses.com/uploads/1/3/1/4/131453354/gekija.pdf
    • http://thfoto.no/uploads/1/3/0/3/130313564/wibiduwezipeful.pdf
    • http://mykinkclubcams.com/uploads/1/3/0/6/130622036/9f691b6a6.pdf
    • http://lolastreatstop.org/uploads/1/3/1/3/131398530/doxumena_pexakulukinom.pdf
    • http://kristenyee.com/uploads/1/3/0/4/130488451/89754.pdf
    • http://netdevl.com/uploads/1/3/0/7/130738482/737a5.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_off000074ef.bin
085a32c962c1af6557aaa167e2f384d122ca2379d259830925ffb83cddee9786		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 10732 bytes

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