Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be458ef1d424fd9…

MALICIOUS

PDF

128.8 KB Created: 2021-03-05 23:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 06e2f95960657f69c9c819c2eb8921f8 SHA-1: 2f66bafb2360ead928068402e369bf9ee882b7f8 SHA-256: 4be458ef1d424fd9a9339fdc60f3f945f786356ad630365fb36e726a2ee6df07
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being 'https://gimoguvi.ru/strik?utm_term=o+que+%25C3%25A9+seo+no+marketing+digital', suggesting a lure related to SEO and digital marketing to redirect users to a malicious site. The document body, though heavily obfuscated, appears to contain similar thematic elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/strik?utm_term=o+que+%25C3%25A9+seo+no+marketing+digital PDF link annotation
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/mavajuverilago_jojamitib_gebunumoki_wuroxefagabaru.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/hahruhe/nivuratipiworesev.pdfIn PDF document text
    • http://reactivascotia2020.com/79401824109tvn9p.pdfIn PDF document text
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/7465710.pdfIn PDF document text
    • https://cdn.sqhk.co/pidikuso/bjjRigs/city_block_distance_between_two_points.pdfIn PDF document text
    • http://govusinixarimi.iblogger.org/interview_assessment_template_excel.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/how_to_connect_powerline_1200.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/sjjhige/37749325527.pdfIn PDF document text
    • http://italywow.info/fofatelamidalar7qf41.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/89313d63f31863.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/693754.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/gafazevezibewotelig.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/higfgds/miregusoki.pdfIn PDF document text
    • http://update-win20.online/how_to_say_the_mandalorian6qjd1.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/hggdUdE/descargar_zoom_cloud_meetings_apk_para_pc.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/73555639564.pdfIn PDF document text
    • http://ergors.space/arterial_blood_gas_analysis_interpretationjezrg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomebitatabapid.epizy.com/daikin_air_source_heat_pump_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4e6e37-effc-4f8f-bb2c-c0fe6302a563/what_channel_is_newsmax_on_spectrum_charlotte_nc.pdfIn PDF document text
    • http://zojopek.epizy.com/79485150557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d818ded-0bcb-465e-a2f4-713ebe56fb02/6023740732.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/70029231973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b3bc3b-76e0-47b0-8324-8146e5538a28/whats_a_rag_doll.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_off0001b8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D0 5504 bytes
SHA-256: 3c2f5165249c0976fd6e6dd23d4f0eb0c7d8da36e911c8ee9fc252d9494cf46d
font_01_sfnt_off0001cb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB24 13200 bytes
SHA-256: 3453e44c9dd19c581f331f63bc17530e8cf0205beac2e6c9c9b58da999baca6f