Malicious PDF — malware analysis report

Static analysis result for SHA-256 376b4e55e370b5b6…

MALICIOUS

PDF

44.1 KB Created: 2020-10-06 18:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: abdf9fb15c6d613755f115436df1d584 SHA-1: 0d345542f72b82ff197f2099c84883b5cf97ad6d SHA-256: 376b4e55e370b5b603b9320be94f4b93aa9203383c1377edafb729fcca650abc
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=texto+expositivo+argumentativo+pdf In PDF document text
    • http://files.lukekurey.com/uploads/1/3/1/8/131871970/3019577.pdfIn PDF document text
    • http://kamuwumol.sharrattwater.com/uploads/1/3/1/6/131637047/vadudixasamepi.pdfIn PDF document text
    • http://files.jonathandavidsmithinc.com/uploads/1/3/1/4/131406893/jovilagabasije.pdfIn PDF document text
    • http://lolaboful.davishouseofcatering.net/uploads/1/3/1/3/131398455/2192903.pdfIn PDF document text
    • http://files.jillrapperport.com/uploads/1/3/1/3/131381288/0fb0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9547/2793/files/devilgotchi_growth_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/bonukugizulejer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1279/4786/files/crispin_the_cross_of_lead_study_guide_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/coast_guard_orm_process_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/werogofom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a54f20-ac83-4bd2-93c4-b5bc54fcced2/gijafalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ad6d72-c6eb-4897-a31d-4cd99a0a8b4f/41141260866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99476609-4089-4614-9b6e-797f77579eb5/lelorexiwaletowedeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf133d4a-9c21-4142-bba3-6edfebcd5e12/viralogonivosuzoronazakon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f4ab026-7f1c-4b20-bf64-90045c7bbba5/konul.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE2 5408 bytes
SHA-256: 12185499f97aa79453bd98cc114cb5907c81217b10c8ea7db7715b2be69324f9
font_01_sfnt_off00007e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3C 10828 bytes
SHA-256: b0a93a3059e0ab15de18f47c7b2e9de31c5d09eb89620897c223c755db17998c

Open this report in the interactive analyzer, or submit your own file for analysis.