Malicious PDF — malware analysis report

Static analysis result for SHA-256 367da5d7e7598949…

MALICIOUS

PDF

80.0 KB Created: 2021-05-09 07:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2174284d31571b9c4dd640bfe0eb03f9 SHA-1: 2af1d0e459207cd356c5b13e7e709c779eabbb7f SHA-256: 367da5d7e75989499582caeabffa7972e4cde0b0119ff7d775362d212984b99d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://zajinet.ru/strik?utm_term=where+to+get+cat+fixed+for+free+near+me, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=where+to+get+cat+fixed+for+free+near+me PDF link annotation
    • http://fizarumokugafu.mywebcommunity.org/33274333521.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/biology_class_11_reference_books.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/jafebixavixi.pdfIn PDF document text
    • https://talaxekagaros.weebly.com/uploads/1/3/5/3/135347480/jepalozezigaxet.pdfIn PDF document text
    • https://lirigudufov.weebly.com/uploads/1/3/0/7/130776684/950c4a22cde9.pdfIn PDF document text
    • https://mogogumabes.weebly.com/uploads/1/3/4/9/134900096/pomedeboxosuzilu.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/28902003477.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/ap_sachivalayam_syllabus_2020_in_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/926738fd-3aca-41d4-b85d-101155971f8e/precalculus_with_limits_3rd_edition_teachers_edition.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/kopewisuzekizi.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/google_sheets_conditional_formatting_color_row.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c53a965-6001-4465-9ed8-16c0ba43063f/20116018848.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/how_do_i_love_thee_line_by_line_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c54fa7-ac3e-49db-b022-c5b3c02243c9/what_should_a_letter_of_recommendation_for_medical_school_include.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/68982708042.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/is_garmin_better_than_lowrance.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/sixubekil.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/dajetejaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc3155f-ffd4-42cb-bb78-4a50615e8bfb/my_family_and_other_animals_series_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/sims_3_generations_key_code.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/gunslinger_guide_pathfinder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 5092 bytes
SHA-256: 01d48047cf4dece608306a24f7149be0368947a0ded6d93d6b2d2afe8463121d
font_01_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 10848 bytes
SHA-256: 63386ac7860e450f40b024217176f01bceef17ba834e082c6aa1ba23f7197e69
font_02_sfnt_off0001248e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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