Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed86771bf2e3be23…

MALICIOUS

PDF

49.5 KB Created: 2020-10-19 22:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d3d9c7252c04220b7a382f13d612418c SHA-1: dab83a58c468bf97609405c4a3023293ed7a010c SHA-256: ed86771bf2e3be2311d66a85f511d8663fb78ff001584434b0e3a6d2b397355c
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://ttraff.me/123?keyword=gastric+motility+physiology+pdf In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/javimokudafaxe.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/gemam.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/fuwadujer.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/fitakojemefoxetilaj.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f8bdf98c97c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86fbe59227d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8893d05de1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8747d7aab4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f8afbd1021bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8886b031ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f8cb77175c06.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/nojewofaja.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/3284852.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/razisepijelus.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/vusikebujakixem.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.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/bd98574c-f8b3-4335-9f04-1030d1ccad2b/97978283617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ca814f-2923-4e49-a12b-186dccd5425b/39231941749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca8290e-03aa-4959-8cc4-46a4812e4b68/58801780924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034f4fdd-d689-4c13-897b-40a7caff945e/ruvewijaretojinumid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28177f9d-446e-4c38-bf7a-a10b1c80227c/58979210806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159716d4-9fe5-49c1-b34c-8ed2446b9d39/kebosulowabexis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2f6904-4f1b-47ae-bde3-94f089f28080/3553674437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2161ab43-eecc-499b-9d5d-0ece24049f81/xagelobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e029131a-f8a4-4d41-8b18-7f2c0da878ec/85567003143.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_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 5704 bytes
SHA-256: 1bfed27c3c6cb7b5d2edd8b6e0e9cbf4fbd8a139188075e159114a56fb9a9d3a
font_01_sfnt_off000094d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D1 10368 bytes
SHA-256: 0f26d70a76b3c09ca66c9ca2fd00f6fb810e401cb1af3e0ab2febf17418cc819