Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66e3789f76daadf…

MALICIOUS

PDF

71.0 KB Created: 2021-05-27 12:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bfdd4c086fb71dedc65d5088c42cc5d6 SHA-1: 228ba86dea8e93f486ea43d92ee3cb56183c1502 SHA-256: d66e3789f76daadf7fd0638444783296ae893d850da45f7e1c7d4f39bd9be2bb
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The primary URL, https://mezovuduw.ru/strik?utm_term=watch+borat+free+online+full+movie, appears to be a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=watch+borat+free+online+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd7cfcd2b6a2.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/migapo.pdfIn PDF document text
    • https://sibujoxosuzeru.weebly.com/uploads/1/3/4/4/134499285/meributetisa_surises.pdfIn PDF document text
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/9ed8a96f09558.pdfIn PDF document text
    • https://wugivata.weebly.com/uploads/1/3/4/8/134872137/ruwaj.pdfIn PDF document text
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/5846525.pdfIn PDF document text
    • https://vekekugez.weebly.com/uploads/1/3/4/8/134883785/tafobugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_601b2d876660a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_6001d52da0eaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5ff067b5f2e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450640/normal_6049734b67a23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_5ff4d2bf8cb1b.pdfIn PDF document text
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/58dcc52.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/3582b11e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449781/normal_5ff9a58db5884.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/66f0542d-6e3b-4e48-be76-3058d1be81d3/59444750577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb730e4-ac47-4801-937b-a58c956f4972/lenovo_thinkpad_t420_graphics_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7723fff9-37f8-468c-bf38-83babcd8602f/26259853535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c12a158e-dca5-467f-8a72-a20ddd6474ad/bemotan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c017cae-862f-48af-bbf2-c69953e9f6cb/namodegiluwifizibilixaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd631b6b-993a-4c58-acdb-c764ee143d52/will_they_be_a_season_5_of_13_reasons_why.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f247750c-ddab-453f-be55-5955fc710151/31540229365.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_off0000d916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD916 5156 bytes
SHA-256: 54ae6ff8767c4ff8a74b42f90e59b978fb6fab012e445d29a5cd4de53641bda6
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 10536 bytes
SHA-256: 43ec48e7e269492d079241bf08ad551c27a484974ed751aa1db6eb1d83437da8