Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d79351e685c1fe0…

MALICIOUS

PDF

45.1 KB Created: 2020-10-27 19:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 70e556951e83c70944ec4b39c8ebfd30 SHA-1: aa9d6a7a883e83f7df28918b0bfb474b16a032d3 SHA-256: 4d79351e685c1fe0ee83a91b3c0007c695884307dfc44521f66c8a41fa1b3430
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=barry+season+2+episode+7 In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/zupejomazegizonik.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/ruputifavasabegizof.pdfIn PDF document text
    • https://juzugimigiroteg.weebly.com/uploads/1/3/2/3/132302883/sogamuzuvinud_jipemijivog_nevaxuna_nosubub.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/6434741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f88032c4c9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f88a6fe67a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87019fb48cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000071a1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000071a1.bin)
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/liste_aliments_sans_gluten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9484/4585/files/55946200721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4120/1562/files/9996465829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9564/6101/files/aaos_spine_conditioning_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/adverse_selection_in_health_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/21473945273.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/sieve_analysis_test_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/pdf_antropologia_uma_introduo.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 extracted file (font_00_sfnt_off000071a1.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A1 5284 bytes
SHA-256: 2460e8b3c334990d73a9ccb9641089a3165ca32d9cd35a6b64d2ba8ce45e8749
font_01_sfnt_off000083b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B5 10572 bytes
SHA-256: 4256c879bf36e4b512976b76a436562c07d5e43613923cf45bcf9f3a7a69f5c9

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