Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1c0f6497417eac…

MALICIOUS

PDF

40.8 KB Created: 2020-03-23 12:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4c563e826bd3fd21e921aa30c0c291dd SHA-1: ddfb14b9a258b48578ecc9bd7b6627f467c269ca SHA-256: fa1c0f6497417eac4254de169c36e8b68c44bae486e30ea2dc9c1392f6feabcc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Yoremia calificaciones primaria 2019' and references the wkhtmltopdf tool, suggesting a lure document. The primary function appears to be acting as a link farm, directing users to numerous external PDF files hosted on various domains. The embedded URLs are likely used to distribute further malicious content or for SEO manipulation.

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://calicorealestate.net/uploads/1/3/0/2/130287953/130287953.html#yoremia+calificaciones+primaria+2019 PDF link annotation
    • http://striba.net/uploads/1/3/0/4/130476853/lorakob.pdfIn PDF document text
    • http://www.lenceriavanity.es/uploads/1/3/0/2/130273872/sakaloruzexafi.pdfIn PDF document text
    • http://suicidepreventionproject.com/uploads/1/3/0/6/130604101/gobotitir.pdfIn PDF document text
    • http://blueinkrealty.org/uploads/1/3/0/6/130604281/winexidaxebepaw_nitomoguj_magofufowufikax_pajikaniga.pdfIn PDF document text
    • http://trainwithaheart.com/uploads/1/3/0/4/130488382/katajezuluderu.pdfIn PDF document text
    • http://redpenapp.net/uploads/1/3/0/2/130289367/2903915.pdfIn PDF document text
    • http://floridarealestatemarketing.com/uploads/1/3/0/5/130588962/vapimogu.pdfIn PDF document text
    • http://x0807796xstreamtravel.xsideas.com/uploads/1/3/0/5/130590577/4409756.pdfIn PDF document text
    • http://livefullyknownfullyloved.com/uploads/1/3/0/7/130775830/paribazujudino.pdfIn PDF document text
    • http://dogemoon.net/uploads/1/3/0/8/130813524/pogisufiwav_sofiwato.pdfIn PDF document text
    • http://www.truth-awakening.com/uploads/1/3/0/6/130620674/ditigasijo.pdfIn PDF document text
    • http://happihearts.net/uploads/1/3/0/3/130379226/tatebipakajepu.pdfIn PDF document text
    • http://move4health.net/uploads/1/3/0/8/130815013/3181468.pdfIn PDF document text
    • http://lovehouse.org/uploads/1/3/0/5/130589386/dcd18b65059.pdfIn PDF document text
    • http://vpmsilverbars.com/uploads/1/3/0/9/130968956/senizimunajogema.pdfIn PDF document text
    • http://paulaweeksinternational.com/uploads/1/3/0/6/130639994/vunodaberan.pdfIn PDF document text
    • http://christiansaechao.club/uploads/1/3/0/7/130775645/kedanip.pdfIn PDF document text
    • http://www.solosnurse.net/uploads/1/3/0/7/130775339/bcba7cf.pdfIn PDF document text
    • http://mobilemechanicdagenham.com/uploads/1/3/0/7/130776249/5444080.pdfIn PDF document text
    • http://cardasiscounseling.org/uploads/1/3/0/6/130639809/madabofexa.pdfIn PDF document text
    • http://nashvillebikeparty.com/uploads/1/3/0/9/130969627/e13139c843.pdfIn PDF document text
    • http://arnould-achats-consulting.com/uploads/1/3/0/5/130588928/xibaxonup-xudizixukadi-kewonaxexapotor-tujugo.pdfIn PDF document text
    • http://februaryvioletphotography.net/uploads/1/3/0/6/130604488/sozoz.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 2

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_off0000740e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 8760 bytes
SHA-256: f609f84c36948dfe247adb1f2625522de895f57041ff929ed0fcae90a4284456

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