Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8522c90574cf90…

MALICIOUS

PDF

70.8 KB Created: 2021-03-04 20:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 89033272bb8e6f0d60b3f763c00bb2a6 SHA-1: 552261e3769685d0982b5926098d25207cc85e3a SHA-256: 1b8522c90574cf905f423e9a71a231c9ce0241e6380d6d3774dae018858de863
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/wix?keyword=town+of+hempstead+sanitation+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487905/normal_5fd9b48348ce2.pdfIn PDF document text
    • http://murupewobot.iblogger.org/39225653739.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/43ab1ce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_6018a01aa69de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_60134029494ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475562/normal_603044f51847b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_603debe37dc1c.pdfIn PDF document text
    • http://jovumelikas.22web.org/kofixepujug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_601220b143c7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_601f603769cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_602cb0cb9d613.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/mipev-manezazuwowaj-jaxatip-tisovoxesig.pdfIn PDF document text
    • http://newser.site/15204878441xeusy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5ff658baac40e.pdfIn PDF document text
    • http://disconto50.info/lozelegibanulititemewewuns065u.pdfIn PDF document text
    • http://top-agent.ru/hotel_business_proposal_samplevndft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_6014498bb044c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 5412 bytes
SHA-256: 9a6b31c773aa9e11ae5a3b47c65aeb60c45825d1c7a53ff93a67ceafd90f2659
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 10304 bytes
SHA-256: 26bccac41115f03de6858668c35bd05eece30795e56f643a739f6237899c80d4

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