Malicious PDF — malware analysis report

Static analysis result for SHA-256 465f51e4034d1039…

MALICIOUS

PDF

65.1 KB Created: 2021-02-18 12:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d592572e40bdd40cfabf108a0acf5cf1 SHA-1: 2155f0177b813bcb96acf86109d41f36cd632281 SHA-256: 465f51e4034d1039a1ebb7c5578eece7107068f767219ce64ba7ebcaef12a748
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://leonvi.ru/wb?keyword=unitypoint%20clinic%20family%20medicine%20-%20ingersoll PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479224/normal_601112907157d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418783/normal_5ffbe77b2b23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_5fd65f27f2f61.pdfIn PDF document text
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/koliruz.pdfIn PDF document text
    • http://winoorama.site/2015_audi_q7_maintenance_manualghnxj.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/risojerigu4d2mh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6020ae3942107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5ff52d141b450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_602a225616d49.pdfIn PDF document text
    • http://mkuu.club/what_do_you_write_in_employee_acknowledgement0emty.pdfIn PDF document text
    • http://bestsalestoday.xyz/figure_eight_tasks_answers86jqp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_601a9d3ea0daa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/varnishncsa_log_format.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/47227672845.pdfIn PDF document text
    • http://rozazidugo.epizy.com/mckinsey_problem_solving_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/purevpn_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/14193806304.pdfIn PDF document text
    • http://wonenuw.epizy.com/female_reproductive_system_label_worksheet.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_off0000c33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33F 5600 bytes
SHA-256: 376419c34777f9240b3e03660e1df2e9c28ff9cdf159bdb540a57632d46878ad
font_01_sfnt_off0000d64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 9612 bytes
SHA-256: c167c4ddcca4ccf938645cbfa9881d00ed046efca1f9b75f052f327a4c5b679c

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