Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cdfa10e5fe9357…

MALICIOUS

PDF

55.6 KB Created: 2020-10-14 17:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8f2485179dcd20c5338733133ee1c671 SHA-1: bbf2c32a608b0a27116cd4ce5b2af8bf742158ff SHA-256: 28cdfa10e5fe9357c835e3a7aac7709f016620e8678dbdadbc9745dca87f5cd4
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=wynncraft+underwater+quest+guide In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/56928956893.pdfIn PDF document text
    • https://site-1043491.mozfiles.com/files/1043491/suxalowoxowuvomit.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/1330261600.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/gawemubanuwezixasesa.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/rolofapanuromasopuz.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/657ea9b0-928f-4487-92d0-a8c7dca15d82/10896094625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c344e0-9c9d-4d36-92d5-f5e2bcc7008e/54774984144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946bf9d5-21c8-4649-8232-079b535a48fa/35858311057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01463f2e-e9cd-4d25-a834-660b5c1aa7a9/16286913317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ef0680-9e20-4e03-8313-ea12daff0afd/vosutogatisepovufas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/8873/0054/files/pineda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7673/7956/files/rurizixobefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2256/9631/files/vuzefojetasiribefuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1807/9386/files/muttluks_dog_boots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4404/5468/files/normas_de_auditoria_governamental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4832/1183/files/xaforatosezubopof.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_off00009436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9436 5492 bytes
SHA-256: e967c18fbebaee53c085be259d261093af926a5efa3d48e3e70e4f60636c829c
font_01_sfnt_off0000a701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA701 13364 bytes
SHA-256: d73ba602873222dd25545f1de5c5c0a13e58be6612cd852f497c4330c29d1173

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