Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f451e320260980…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 12:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0bef8a7c7e8df6fecedccab59087de72 SHA-1: 19114765a4ee81b085555e04b83f83748b8518b2 SHA-256: 55f451e320260980c05a0dab38c57416edbeb36bbc720fce117c94afaf8a9270
186 Risk Score

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://xezojetit.ru/123?utm_term=esl+games+about+colors PDF link annotation
    • https://cdn.sqhk.co/fomanazoravu/eifTKif/event_management_skills_resume.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hfOYRjf/50192269073.pdfIn PDF document text
    • http://gtmedis.com/general_guidelines_for_clinical_pharmacy_practice_slideshare7o5uy.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/7wieigY/badlands_national_park_south_dakota_weather.pdfIn PDF document text
    • http://sarhello.online/11862604573s1yv.pdfIn PDF document text
    • https://cdn.sqhk.co/tivaboloxome/YhfigRh/50790131060.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/OihyidS/fodaminujav.pdfIn PDF document text
    • https://cdn.sqhk.co/xamozafi/cIwv9W7/15243386439.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/gLibkii/waruvosilifezafidivotiki.pdfIn PDF document text
    • http://dronextactical.xyz/6925773392546r0b.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/tAiiHia/ny_and_company_curvy_jeans.pdfIn PDF document text
    • https://ragadavifomo.weebly.com/uploads/1/3/5/3/135306528/4acbe6ffdb106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejutox.rf.gd/how_to_create_form_wizard_in_bootstrap.pdfIn PDF document text
    • http://wazinupizut.epizy.com/85527539653.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/benchmark_job_comparison_sheet.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_off0000df39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 5216 bytes
SHA-256: 30d0883e1f167b8ce72cdbdd531c5af4cd37164f739ae0ced6010ddad42b5646
font_01_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 10184 bytes
SHA-256: 135a3f3036e7b64058b8d2fb827dffebc104c40b07804b76436d38fe824667a6