Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d251f84fbb2f5de…

MALICIOUS

PDF

43.1 KB Created: 2020-03-26 04:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 3ad9f59e3a46ecdb755983d82001f912 SHA-1: c83375bd6997590b3e6d5de8c265ec1dacf9595a SHA-256: 4d251f84fbb2f5dee2dcb500abf74b18526044c5cc7cd4b71b9a590f7a6a52b9
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these external URLs, suggesting a link farm or redirection scheme. The primary purpose appears to be directing users to a multitude of unrelated websites, likely for SEO manipulation or to serve as a gateway to further malicious content.

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://designproinnovation.com/uploads/1/3/0/3/130323409/130323409.html#como+escribir+una+funcion+a+trozos+en+matlab PDF link annotation
    • http://cgcindustries.com/uploads/1/3/0/2/130292143/rosekovovolalig.pdfIn PDF document text
    • http://www.vnandusimmigration.com/uploads/1/3/0/3/130323647/mirodosakokekire.pdfIn PDF document text
    • http://www.quicklycoached.com/uploads/1/3/0/3/130313360/a8e30dce654631.pdfIn PDF document text
    • http://hostmaster.nortonparkproperty.co.uk/uploads/1/3/0/7/130739288/9764133.pdfIn PDF document text
    • http://www.hcs-conference.com/uploads/1/3/0/4/130483862/1099351.pdfIn PDF document text
    • http://govfilingsonline.net/uploads/1/3/0/4/130483769/1ecfa.pdfIn PDF document text
    • http://kelzfm.com/uploads/1/3/0/6/130604836/dofujisizuwinuwob.pdfIn PDF document text
    • http://www.stichtingdynamis.com/uploads/1/3/0/5/130540397/2097d3531.pdfIn PDF document text
    • http://coachjenclark.com/uploads/1/3/0/9/130969238/sazakig-xixozimidusab.pdfIn PDF document text
    • http://mynucreations.com/uploads/1/3/0/5/130589199/827456.pdfIn PDF document text
    • http://administrator.uptowneventing.co.uk/uploads/1/3/0/3/130323092/sobazazida.pdfIn PDF document text
    • http://kissemsoft.com/uploads/1/3/0/6/130639062/7e78781ccd.pdfIn PDF document text
    • http://hollisarchitecture.com/uploads/1/3/0/8/130813837/172080.pdfIn PDF document text
    • http://buginthesystem.com/uploads/1/3/0/2/130289653/tadototuzuki_buregarikuwe.pdfIn PDF document text
    • http://usu-retona.site/uploads/1/3/0/7/130740363/665c37.pdfIn PDF document text
    • http://veteransfoodserviceco.com/uploads/1/3/0/7/130775923/nawemim.pdfIn PDF document text
    • http://thezoen.com/uploads/1/3/0/2/130292104/wukise.pdfIn PDF document text
    • http://host.creativedatainc.com/uploads/1/3/0/6/130621257/pedufojotitawuluzogu.pdfIn PDF document text
    • http://www.nxtlvlprospects.com/uploads/1/3/0/5/130541186/sowugazatujodapuz.pdfIn PDF document text
    • http://tiffcopp.com/uploads/1/3/0/8/130813577/4600893.pdfIn PDF document text
    • http://mta37.somekindofsimple.com/uploads/1/3/1/0/131070125/sejat_xijox_pekolotuti_bupekesudodow.pdfIn PDF document text
    • http://www.cruisesirena.com/uploads/1/3/0/5/130550871/65c28.pdfIn PDF document text
    • http://npkceku.sites.logojoy.com/uploads/1/3/0/7/130739662/pukubo-wasajoj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/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
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B0 10400 bytes
SHA-256: 8ed133620946f4be96e3be98cd4375577155aa19bfd1b71afb74b81936219966

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