Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3dc67c855337e7…

MALICIOUS

PDF

40.4 KB Created: 2020-10-14 17:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dc4c8d2000b0825341be04e17248e9a4 SHA-1: 75806c1406d02f65c1014f8c52df55b18ea97ea8 SHA-256: 1e3dc67c855337e73170de781adbf61271a3077e8ef9c764a2bde6532c89eb97
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=sugih+tanpo+bondo+mp3+wapka In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/kopiwu_gotatumeturi_bovejixegas_vivikow.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f86fcca0fb26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8701d080cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86f52423c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f870f268a02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f870fe9d0217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8700a56f1f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86f4dbbe88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8701ad38e70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76556446-49d3-450c-92fc-96c4d2734cec/56376547117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824cf2ea-c4d0-4dd2-817f-2e432a0c36c8/xokilejepudeturokidadiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21663104-9c72-408a-951b-a71a5a64aa13/6783077341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8c6dd3-e887-412a-b977-61c35722dbec/baxegatusosoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02871200-bf15-4bb7-885a-bcecf3c4c094/xafedaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7196/2777/files/nawaranamipegajeduge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1510/2374/files/begesolewunomulatifarig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5232/9888/files/xupirusetupukamukog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/historical_method_sociology.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_off00005319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5319 5632 bytes
SHA-256: f0f39d6edb0d7b49c78455d1afec74d4a0bb61120704d39234e597bbe923d0e1
font_01_sfnt_off0000661e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661E 14064 bytes
SHA-256: dba82151652f05d4cd5fead7ecfe871b1b677eaef1f424cb16ccadad2072560a