Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc4d7ad491a45ef…

MALICIOUS

PDF

69.0 KB Created: 2020-10-19 12:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 89f6ae02a9667e7be4ebe70103b5b6d3 SHA-1: 5dfc875c5e9a508ac658b490f7d6336943078542 SHA-256: 2cc4d7ad491a45eff2db7483811fad7a8b335edbf7bff0108d6d12af169c724b
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/123?keyword=japan+guide+hoi4+man+the+guns In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/27b0b.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/gejaxuruxil.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87284eae09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f899b6dbde3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f8c59f79a120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f89eb4ef18f5.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/1/0433/7808/1959/files/gemepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0318/2744/files/vesabibizemijebogeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/9949/6871/files/lezemenikuxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcc89a5-0f5b-438f-96fc-ecdcdf35e27d/lefodiziwizedazeluwopur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7685a4-ccf9-4c83-b1e2-5ae3f7d0e79c/34359870184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab4b3aa-cf64-4cb3-9339-3bdd8bc80c86/75251978517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cd8755-22b7-4bcf-8d9d-3b0540e040b5/9757473050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac219f48-e2de-4eb2-8ebf-0fdecb46cbd3/74159996283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2844/7900/files/types_of_chromosomal_disorders.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3767/3630/files/bolonozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/world_population_distribution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8e268b-34ce-4df7-9ff6-b5346e2ffefa/silujutofeginoronefariva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0936dff7-8a50-4cac-a400-8e25ce1df9fc/23914946277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda4b1f9-8e91-4027-ae02-940b51b84773/dixuwufakoxevedode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9634aa-acfd-42e4-a100-35fbe9eda8d1/jebezizazeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb06313-8112-4d19-a580-740c2c93080f/9845023871.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_off0000c565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC565 5324 bytes
SHA-256: 2156011656f19d060e4e05518a403e82cb127a9d5628d3151ee8c4fef72b03a2
font_01_sfnt_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 14680 bytes
SHA-256: 029c49a16bb073bb0f86889bc65a6e859d527697fc6786e2424c5544ffc4e6cb