Malicious PDF — malware analysis report

Heuristics 5

• 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.
• 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://cleanguys.co/uploads/1/3/0/6/130640046/130640046.html#ecuacion+para+calcular+la+entalpia+de+una+reaccion PDF link annotation

  • http://contemporarypossibilitiesjolie.com/uploads/1/3/0/4/130494801/pubisawu.pdfIn PDF document text
  • http://thefellowmanlegacy.org/uploads/1/3/1/4/131437785/regup_xoteravimedo_pekenuguzor.pdfIn PDF document text
  • http://karithierer.com/uploads/1/3/0/3/130313089/dizuzubip.pdfIn PDF document text
  • http://jordanschuman.com/uploads/1/3/0/5/130588735/5064842.pdfIn PDF document text
  • http://healthangelcoach.com/uploads/1/3/1/3/131379696/219794.pdfIn PDF document text
  • http://cannabisnursepartners.com/uploads/1/3/0/6/130620778/7555812.pdfIn PDF document text
  • http://cardifftrailertransport.com/uploads/1/3/0/4/130488699/lilevirakimugab_kulofenejone_zoropibaguvixaz_kareto.pdfIn PDF document text
  • http://hydeparklocal.com/uploads/1/3/1/4/131453252/zovakitapa_tekizag_tugezebor.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn 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
  • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
  • http://www.adobe.com/).NotoIn PDF document text
  • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
  • http://scripts.sil.org/OFLNotoIn PDF document text
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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