Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e71e7f50122b453…

MALICIOUS

PDF

78.5 KB Created: 2021-04-03 08:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2eb4bb974627110bf41019d3514f677f SHA-1: dc9425709e678d9b087256a588061216ad6daacf SHA-256: 0e71e7f50122b4539e1bb37739b1a3c96257f62874a9c4658ed2f5f7f23d6ddd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, with the primary goal appearing to be directing users to potentially harmful external websites. The document body, though heavily obfuscated, contains keywords related to drawing ideas, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://resalured.ru/strik?utm_term=easy+abstract+art+drawing+ideas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405925/normal_6065ca0d74e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_6037372923756.pdfIn PDF document text
    • https://lugafowak.weebly.com/uploads/1/3/4/6/134647172/rakapixilawizaj_rugev.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ggjbicJ/russian_car_simulator_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_60560229be126.pdfIn PDF document text
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/383d43f135eea.pdfIn PDF document text
    • https://pokiwaminexaga.weebly.com/uploads/1/3/1/6/131637240/4930132.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/the_magic_school_bus_chapter_books_set.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/hiEC53P/hdfc_amc_stock_price_today.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/xalerodiziguji.pdfIn PDF document text
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/musojigowitevudopu.pdfIn PDF document text
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/9703b7a82c.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/dujesafepogiwut.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/hz1QeaJ/new_mtn_pulse_cheat.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/mibevizodesamo.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/224154ba-e92a-4b50-ad3e-1229cb2a851e/2002_ford_explorer_sport_starter_relay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae7fce0-b741-4aa5-af04-dd6f8176c6c9/covalent_bonding_practice_problems_worksheet_answers.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/catalogo_vimar_plana.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/punonizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9f673a-c5b6-418b-8e3e-325073c0c796/rufufunufakujiwokuv.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_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 5364 bytes
SHA-256: f75b25bd0eece214c3a5bce568dfbc71f1e2e5780fd29e48edce45583f1d1601
font_01_sfnt_off0001065e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065E 11376 bytes
SHA-256: 3e9ce9c9130f4a0c38ed9e5cacb408cd68914c4897c5f77d6df87fb93e7d3aac