Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eb7fc7ffe992a9…

MALICIOUS

PDF

80.3 KB Created: 2021-04-10 03:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5509fb524bd56a9edf4585b72f66673 SHA-1: ce1f4afb3286ec8fde7e6de27593a02d06657291 SHA-256: 16eb7fc7ffe992a9595f31d163ed9c7c9747ccd6936c9b94573d8392282d46f2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=amazing+bible+timeline+accuracy PDF link annotation
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/2007005.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/db9565fedc34d.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/97098748874.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/ad4c624c4.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/2156262.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/basic_grammar_questions.pdfIn PDF document text
    • https://gafipokezi.weebly.com/uploads/1/3/4/5/134594596/4962736.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/xumot.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/3560665.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/328ee2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_965e00649f8e43d0a1aa20bdb04402cf.pdf?index=trueIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_4fd7c52651264fbab631ccd0b397007c.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_5206bf089bb541029c2a4d7d818e90f9.pdf?index=trueIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_dea212c8199d45cdb1362c7953226591.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/bimenupageronuta.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/28485936350.pdfIn PDF document text
    • https://e7c02ae7-ba66-49ef-8fe7-d4c265c54a1b.filesusr.com/ugd/bc5701_b642980db0634d28a9d0e9a5b80b4906.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/falilubetenevowadedara.pdfIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_2d73c3f228cb46f48e80e430515b4ad6.pdf?index=trueIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_297f8241f7444303aca560f478d19666.pdf?index=trueIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_a353fb2e82df4239b62a4499fbb0d6f5.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_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 5220 bytes
SHA-256: cf2886e27cde74a8bbe229535785938187b9a804159dc07c77b09a0aaa8557c3
font_01_sfnt_off00010dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 10736 bytes
SHA-256: 48703eed6eb66a48c69965ed95bb936219836deeb38395eefd34be291a231980

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