Malicious PDF — malware analysis report

Heuristics 6

• 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.
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
  Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
• 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://heidihackford.net/uploads/1/3/1/4/131454656/131454656.html#scanf+cmd+windows PDF link annotation

  • http://chelseabulldogs.org/uploads/1/3/0/5/130545278/viwapenoke.pdfIn macro / runtime command snippet
  • http://politicsrunamok.com/uploads/1/3/0/6/130604620/zotipozutimoli.pdfIn PDF document text
  • http://karlageraci.net/uploads/1/3/0/5/130551696/pavujujonot.pdfIn PDF document text
  • http://shinyshoping.com/uploads/1/3/0/2/130288533/7467566.pdfIn PDF document text
  • http://entertainmentcorporate.com/uploads/1/3/0/3/130313081/6694613.pdfIn PDF document text
  • http://nps-music.com/uploads/1/3/1/3/131378919/xegubadatag_fexiv.pdfIn PDF document text
  • http://unmundodesabor.org/uploads/1/3/0/8/130874318/c47d585.pdfIn PDF document text
  • http://rachelkaterose.com/uploads/1/3/0/2/130271116/luwevobulagoj.pdfIn PDF document text
  • http://friendsforamenbrown.com/uploads/1/3/0/2/130272905/kalodixives-dirifusugokujuk-benuwelebodoze.pdfIn PDF document text
  • http://schwabelfab.net/uploads/1/3/0/8/130813992/5306804.pdfIn PDF document text
  • http://umkangen.com/uploads/1/3/0/2/130291658/2765048.pdfIn PDF document text
  • http://frontlinefordogs.net/uploads/1/3/0/6/130605275/vosusomog.pdfIn PDF document text
  • http://namayretreats.com/uploads/1/3/0/2/130288379/juzegasix.pdfIn PDF document text
  • http://zaironstudio.com/uploads/1/3/0/4/130483232/xupifova-sixugij.pdfIn PDF document text
  • http://4wheelsand1home.org/uploads/1/3/0/5/130551935/xarudowir-rexakigokagani.pdfIn PDF document text
  • http://mcsacomplianceconsultants.com/uploads/1/3/0/4/130483911/rexijimogu-karejogitoxar-sixuv-bexosut.pdfIn PDF document text
  • http://mstumekia.org/uploads/1/3/0/6/130639827/lowuxeg.pdfIn PDF document text
  • http://arabellaboutiqueofnmb.com/uploads/1/3/0/2/130272582/lunikuxafagad_susajiza_bewefezetejil_juxokoz.pdfIn PDF document text
  • http://lonestarwildernessmedicaltraining.com/uploads/1/3/1/1/131163512/877051.pdfIn PDF document text
  • http://fourcornersboardofrealtors.com/uploads/1/3/0/8/130874492/d6a149faab.pdfIn PDF document text
  • http://stanthonyrummage.org/uploads/1/3/1/0/131070530/bojurikawusix_rupesotarepofo_gopaja_morudafijakijez.pdfIn PDF document text
  • http://kfreund.com/uploads/1/3/0/6/130639675/kovijodep.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

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