Malicious PDF — malware analysis report

Static analysis result for SHA-256 290fb7f560174a1b…

MALICIOUS

PDF

70.7 KB Created: 2021-03-05 09:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 900182f5b9789af8a3094aa30b45f5ac SHA-1: 3e735714c5fee11b0ba56b439dc0a83c4bae4ef1 SHA-256: 290fb7f560174a1b545fe01c2bec5967ae7c15dbf24a7be9eaab76f53f27b27f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/award?keyword=dell+optiplex+9010+sff+motherboard PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450723/normal_5fd7a3ac2c8a2.pdfIn PDF document text
    • http://medicinfo.online/bagifigumuavyrt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_604018a9472c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fe908a525ff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_5fe061300fd1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe125d0857ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_6037bd8705794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5fc5bc4e06645.pdfIn PDF document text
    • http://peskomment.ru/concepto_de_linea_en_artes_plasticasfpech.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_5fcd6bead487f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_602af0ff096d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5fc68683778fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_6033da93be55a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fcf2de98e644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481417/normal_5fc84f0548a11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_0dfb5bcb888e40ea9058400aee22ea9d.pdf?index=trueIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_fb4d402c5b984de3bbefd4b4874a1bf2.pdf?index=trueIn PDF document text
    • http://xikabufozajo.rf.gd/simple_english_sentences_for_daily_use_with_kannada_meaning.pdfIn PDF document text
    • http://reketop.rf.gd/wonaxusex.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_6bb956a35a81429685ae879ecbb7b6e5.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_7e487595464944ba9d394fbbc6788e0a.pdf?index=trueIn PDF document text
    • http://rowavironipomiz.epizy.com/vesolunimilajum.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_cf72b66dc5f54affb61a37ebe0940b0b.pdf?index=trueIn 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_off0000d34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34A 5840 bytes
SHA-256: 1398ea806b337407dd75c9e28154ffe83f0d30a194f2d95753b06da6b1a5199a
font_01_sfnt_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 12044 bytes
SHA-256: 53020837a64e2af5c9997d4fda72c6b6bf4c991192d6cd166b30f108c27367e9

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