Malicious PDF — malware analysis report

Heuristics 5

• 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.
• Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
  PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
• 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 https://kerijigobiwut.poletofuti.com/66123451727231077721876524?busudukepezifakijidurudizezuliginizinojedax=sigadogilidamuvusajikotenazaduluwulukajuxavodomazofifizosenejigirobasabulesewukugowizatologebisojuzoxazumesokolupinokajetikoputazuvigavarelejamobupaditezulolatenoxusomoxudamegarofusenewogopiworudejidu&utm_term=free+audio+visualizer+templates&joxiraripotavusajipejebiniwopebenilumojetipexesiwavejaxemukozegapowuzuvof=baduwowonavawevepixifowosamulopotolobopopivasexutatobodevadogijomuzujotojuvurekibakirisamonemomagijimirufakesudumogodevojuz In PDF document text

  • https://kerijigobiwut.poletofuti.com/66123451727231077721876524?busudukepezifakijidurudizezuliginizinojedax=sigadogilidamuvusajikotenazaduluwulukajuxavodomazofifizosenejigirobasabulesewukugowizatologebisojuzoxazumesokolupinokajetikoputazuvigavarelejamobupaditezulolatenoxusomoxudamegarofusenewogopiwoPDF link annotation
  • https://kerijigobiwut.poletofuti.com/66123451727231077721876524?busudukepezifakijidurudizezuliginizinojedax=sigadogilidamuvusajikotenazaduluwulukajuxavodomazofifizosenejigirobasabulesewukugowizatologebisojuzoxazumesokolupinokajetikoputazuvigavarelejamobupaditezulolatenoxusomoxudamegarofusenewogopiworudejidu&utm_term=free+audio+visualizer+templates&joxiraripotavusajipejebiniwopebenilumojetipexesiwavejaxemukozegapowuzuvof=baduwowonavawevepixifowosamulopotolobopopivasexutatobodevadogijomuzujotojuvuPDF link annotation
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://ns.adobe.com/iX/1.0/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://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text

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