Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b12418dda0766c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-08 12:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f58ed4f801cf7b97cad5aa180f9043d4 SHA-1: 4acf10b7f7aae5de90aff347e5fb4abc451d5bfc SHA-256: a4b12418dda0766c88724b9faabfe0ba65df94bcd61c3054971d1510a12bd058
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=eyelet+punch+die+tool+set PDF link annotation
    • http://jetelijunejuk.iblogger.org/datudulik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_5fcee222e3d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_6020b76034e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_603f0cd346553.pdfIn PDF document text
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/61af5eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_603f3355007f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5fcd09bfc23b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_6035fea10bf4c.pdfIn PDF document text
    • http://kikawogax.iblogger.org/kindergarten_writing_words_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_5fd9de4073a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_60243aa1757b1.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/29291956085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcd075d84bfd.pdfIn PDF document text
    • https://woseluwimi.weebly.com/uploads/1/3/4/1/134131525/retupibidezabajijim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455185/normal_5ffe8fe20fb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_5fda40f8adaf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_602c977252afa.pdfIn PDF document text
    • http://wofeboz.66ghz.com/competitor_research_template.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/612eb98e11c590.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5ff0b96fb50b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_60434c26b14f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_6012e1d091b7b.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/gixujosaped.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/c5e016898.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwisuk.epizy.com/xopojarutawurije.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 4912 bytes
SHA-256: dea8476239c56bc77196ba2a104a65f71bd99b25a715e90d1beed09e0f008a30
font_01_sfnt_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 10088 bytes
SHA-256: 749a8bb4082e9e5c83e79972a51b4307e9416170d1767b2f5d60133500f85434

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