Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e9471b8dc584f1…

MALICIOUS

PDF

129.6 KB Created: 2021-04-01 17:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 626feaeaf6dfd0886ce497fc2f5fc255 SHA-1: 723a5f7ec76ff6a5046c17e796e5127de58b35b3 SHA-256: 85e9471b8dc584f1d77df66a080e97b99924518379b27ec2c5f1181f6e76c1e0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=best+self+behavioral+health PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502698/normal_605c0f4081934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_600a03cb7ceb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_603d6d5280aae.pdfIn PDF document text
    • http://jugapus.sportsontheweb.net/gudeforami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_601bb09056dab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xevojubalane.rf.gd/firmware_cisco_dpc3825_docsis_3.0_data_gateway.pdfIn PDF document text
    • http://ligededeju.epizy.com/business_development_internship_project_report.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/68674786163.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_36b2c0387c6242a08f1427a90c2a00ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/angular_6_component_no_template.pdfIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_62146470e6af480b9862a783ba8d95e0.pdf?index=trueIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/diagnostic_interview_for_borderline_patients_dib_r.pdfIn PDF document text
    • https://bc881323-2374-4635-a2b7-f126f9929bd8.filesusr.com/ugd/546a35_2b00e328fd6b4039b2e6b10501949435.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_db5dfb17d73b4c2fb0fef2e034355bbb.pdf?index=trueIn PDF document text
    • http://lofatis.epizy.com/dotomokirisoxalagowusa.pdfIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_30c7c897a01d4df5ad01b2cccc60749e.pdf?index=trueIn PDF document text
    • http://pasazaxara.rf.gd/10531430482.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_dd9d9ab779aa424ea4412cce37d79cec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kufazete/25895591265.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C076 5104 bytes
SHA-256: 06d8615473ae0b075fd8178ec8e094bc8930fe1656b75e68999a4d24c2c37df2
font_01_sfnt_off0001d1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1D5 11304 bytes
SHA-256: b2687df30db840bbdb496fbf6c1bf618b99fdbaf4f4a90427156b27f7d61a68b

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