Malicious PDF — malware analysis report

Static analysis result for SHA-256 77141aaeecad0d45…

MALICIOUS

PDF

39.8 KB Created: 2020-10-18 05:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 67e5d7f03ec2fddbba6f3921996c7bcd SHA-1: e23968daf2fd578f4b259ab456d70ddaa457f5f4 SHA-256: 77141aaeecad0d45a1e460a0da6137effadcbf7fd60dcfb536d3d270dfc57bb2
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/123?keyword=oleo+mac+gsh+560+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f89e5ccb5e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_5f89690d0e31a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f870584bca50.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/3941298.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/5c8886170d.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/883eeef.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/gepim.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/poralizetugit.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/680d6de07c8fd.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bafadodimabagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f8b80e7c9979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8a0c79eeac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f89de8375225.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/3af46cdf-279d-4949-8d7b-4807a27e8cc6/64031188282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b550452-259e-4d81-a36c-8c2674e32c8b/descriptive_adjectives_worksheet_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8787cc0-0f9c-40bf-aea5-97e70119a1c6/botojufubaxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d3dbc8-711e-45cd-9572-d20f360d71ec/dajebubugimanipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5993/3095/files/weathering_with_you_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/geometry_worksheets_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/hubba_bubba_squeeze_pop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2205/3287/files/tuxido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8393/8457/files/3rd_year_anniversary_dokkan.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_off00005d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D09 5564 bytes
SHA-256: a4ef5cce88c598b6469a9d5b45802118f0ab90233c1352bda37efd925d2ec40f
font_01_sfnt_off00006fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD5 9876 bytes
SHA-256: b4d4c56aa208205689ca09013858abef4d4d94a8e8d225eb668db837fb4bbb00