Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c13b9cb0d850c4…

MALICIOUS

PDF

42.4 KB Created: 2020-10-16 07:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d1a2b020abe4947c35abb709d6468802 SHA-1: 2b02e3658862727df9af39d1f04d7107173ad459 SHA-256: 42c13b9cb0d850c4d1f3eef0565a71f13844372658e7a31d40859cb4c3446968
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://ggtraff.ru/pify?keyword=common+core+geometry+constructions+worksheets In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/tugaxevedo-gujikasur-numuvo.pdfIn PDF document text
    • https://sadutixonigonu.weebly.com/uploads/1/3/1/4/131412491/xulofoganaxeras.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f891730ad9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f875f2c272f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f875989ddf5c.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/semuj_famizuveno.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/74aa14804.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/1/0463/8353/0139/files/foxtel_espn_tv_guide_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9795/5745/files/fivudedozejiteloto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0024/9538/files/lixakujigapemip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/mahwah_bar_and_grill_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59a4e7a-e6ac-4d00-a33a-8488bc849300/zuperobebutupole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0bf1bc-71da-4e78-8bf1-693c9ccaa478/50062354814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5aa536e-b2e0-45be-a9c6-22ba9be5d823/43125191945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e846e30-851e-4d1a-a200-c241ba78358b/vebowodejakuvegoxawezuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d18385-db35-49b8-8594-cd6783722a13/84428029888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0028d5-76c7-4724-9cb3-771417b1c8c9/89084075174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73717eca-74ec-457f-ab12-b4b99e58394e/mumezefimatoxetixevogizap.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_off000069b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 5136 bytes
SHA-256: 78d1065ff48d1f0bb1bd89cb0cb336f7f42cdf44c2f4747ac53d920cc1fcb119
font_01_sfnt_off00007b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1A 9660 bytes
SHA-256: cb97b0b78de4b9a12fb1616e5df523a8d047006edc335cea9fe1fb785d3bbe15