Malicious PDF — malware analysis report

Static analysis result for SHA-256 209139826b196095…

MALICIOUS

PDF

93.1 KB Created: 2021-05-21 21:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0bb73fabd10d2f0338fd33b50e7c26e4 SHA-1: 3bff280f17fee59e8c8bcfadcb15b157ffb94525 SHA-256: 209139826b196095809f4ae3921ecf7832fe5cf907ecc610de9bf34a10b96e3f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-related, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary URL, zajinet.ru, is likely part of a phishing campaign designed to trick users into visiting a malicious site by posing as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=home+depot+near+me+open+on+easter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481275/normal_60478acbd5495.pdfIn PDF document text
    • https://norasavunoga.weebly.com/uploads/1/3/0/8/130874384/pefeto.pdfIn PDF document text
    • https://noguzijevamemid.weebly.com/uploads/1/3/4/8/134890426/47388c9e68d48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475728/normal_5ff6c42b0d35d.pdfIn PDF document text
    • https://ponozivodu.weebly.com/uploads/1/3/0/7/130775347/360911.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/74db3fff7a4.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/xekemuzobi_riwumuni_sezawi_fuzadika.pdfIn PDF document text
    • https://dopotixoniwatom.weebly.com/uploads/1/3/1/0/131070918/xoxivetexokotex.pdfIn PDF document text
    • https://loxoratas.weebly.com/uploads/1/3/4/5/134507201/rifaxofutuluzol.pdfIn PDF document text
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/semofejirujo_zapob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/577d692b-47ea-4c85-814c-d00cedf2c93a/pivefojuzokelawazusejapo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/zekedo.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/how_to_use_html_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/34194348143.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/what_are_victoria_covid_restrictions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85981d76-871e-45c4-97cb-bb01cfcd86f9/zijesapezulojutoletajopuf.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/ditunijinupomita.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/abdul_rahman_al_sudais_quran_mp3_free_download_with_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/57778888542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494eb061-a8f7-4aa2-880a-89bf75ae8b51/problemas_de_porcentajes_para_primaria.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/america_latina_y_anglosajona_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/93589461678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5345d27-e5c3-4386-a185-987c33cddcf2/blue_yeti_microphone_settings_for_singing.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/bumerang_taxi_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0967b455-eb57-4940-b61c-d0ddc7e3e046/4860140412.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_off00013045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13045 5036 bytes
SHA-256: 53c345903ddfded656a3344a2304029c307913e78ca684bbba21afb1b47cc114
font_01_sfnt_off00014146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14146 11100 bytes
SHA-256: 74cff14a2c18e02be34919fe14c7d5f571a4c0a9c98e92cd68500cd1abf98522

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