Malicious PDF — malware analysis report

Static analysis result for SHA-256 094eda45294f3bf9…

MALICIOUS

PDF

42.2 KB Created: 2020-03-10 05:08:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 25dcf6d87bab03125a7090e91bd4c676 SHA-1: 354b5fa66640d58bc530adf42175754aafa2a6b8 SHA-256: 094eda45294f3bf9d8b8746c909320ee02868dbd7d3ca90ff904a0fdb3f6d493
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links to external PDF files hosted across numerous domains. This behavior is indicative of a link farm or a distribution mechanism for potentially malicious content. While no scripts were directly extracted, the PDF structure and the sheer volume of external links suggest an attempt to manipulate search engine results or redirect users to harmful sites. The ML classifier strongly supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://w83.brdge.org/uploads/1/3/0/7/130775318/130775318.html#ejemplos+de+carbohidratos+monosacaridos+oligosacaridos+y+polisacaridos
    • http://simplyessentiallife.com/uploads/1/3/0/2/130287394/2570790.pdf
    • http://mx.1995wrangler.com/uploads/1/3/0/6/130605230/nurirajugoxuw.pdf
    • http://delucaconsulting.se/uploads/1/3/0/5/130539128/e2af478d0609.pdf
    • http://bigdumbobject.com/uploads/1/3/0/6/130621951/57850.pdf
    • http://davezajac.com/uploads/1/3/0/6/130605162/vavuxefajetafir-falorid-fujit.pdf
    • http://the-woodworking-plans.com/uploads/1/3/0/5/130539269/33a0a0.pdf
    • http://colegiotabladilla.es/uploads/1/3/0/2/130272420/wolofime.pdf
    • http://xplorcolombia.com/uploads/1/3/0/8/130814121/kuduw.pdf
    • http://acdavisbass.com/uploads/1/3/0/6/130620551/kanexuz_zemavulizi.pdf
    • http://isabellaproject.site/uploads/1/3/0/9/130969247/noxilarabizu.pdf
    • http://thepentecostalpalace.com/uploads/1/3/0/8/130814284/sudatow.pdf
    • http://yasminevintage.com/uploads/1/3/0/8/130814713/jaxagat.pdf
    • http://consciousnest.org/uploads/1/3/0/5/130550777/1840269.pdf
    • http://dns.majesticmeadowstables.com/uploads/1/3/0/5/130539645/a2991.pdf
    • http://www.lifestrategiesbc.com/uploads/1/3/0/5/130540493/xozegomuzod_firifabonobox_jagakuj_jojazemoruwewo.pdf
    • http://davisandcodesign.com/uploads/1/3/0/6/130604528/nijulizemikonu_fasapubeji_metenuduvudibo_subed.pdf
    • http://3rn.org/uploads/1/3/0/3/130324191/5109289.pdf
    • http://sbpal.net/uploads/1/3/0/5/130540405/4152671.pdf
    • http://domainedelalbejot.fr/uploads/1/3/0/7/130776060/9260291.pdf
    • http://desatascosmataro.org/uploads/1/3/0/2/130287463/272c1.pdf
    • http://miftahinvestmentgroup.com/uploads/1/3/0/4/130477945/7519dc4.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_off00007a47.bin
d5a9ee173823d4a1de3d138a132f45e7b77bf94810c18d896ec8134934a028e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A47 8252 bytes

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