Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6f3e17a13d9fe3…

MALICIOUS

PDF

89.5 KB Created: 2021-03-16 07:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e938f43fadd9617d1838097408116802 SHA-1: a509d721eecdee059359cf4df5a30554884dcb5a SHA-256: 7e6f3e17a13d9fe3dda768a93437de6981f965f22c3c69672c2b7b5f45b1e71b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary malicious URL identified as mezovuduw.ru. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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=best+gluten+free+dinner+party+recipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5fe31276710fb.pdfIn PDF document text
    • https://cdn.sqhk.co/lomuwomigez/lpoNVib/big_sky_events_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/iaQS0qO/capitalism_history_video.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/3hfiIAF/64091906279.pdfIn PDF document text
    • http://tiruxuvofov.22web.org/49984270191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_6018dc1f67f98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fe5a94ad5b65.pdfIn PDF document text
    • http://sudesisobibimit.22web.org/how_to_find_the_end_behavior_without_graphing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fc69d11493b2.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/ifidbid/super_world_buffet.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/81fc3396-925c-4c8c-b4d4-ba5bf11eb8ae/campo_laboral_de_la_psicologia_clinica.pdfIn PDF document text
    • http://vodulisus.rf.gd/mozigutawiroxatodomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbe442c-67a6-42a4-9777-750bf4996281/how_to_put_pictures_into_shapes_on_word.pdfIn PDF document text
    • http://difatatufoze.rf.gd/bruchrechnen_gemischte_aufgaben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eff9ede-26d0-4ed2-93b4-285854f5d232/47966233694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/623ac38e-d542-4b75-b24d-2ce04d01917f/942287032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fd93b1-2267-416e-a6da-7ebc9a6d3fbc/fikudiketasepubefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca015a9-c476-43a6-aad6-e9ee4e548f8d/fomusemilawedemiginapixez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5730712c-8c95-4e94-9012-66f49be9ce92/word_that_rhymes_with_parasite.pdfIn PDF document text
    • http://moferamobonar.epizy.com/xadosigaf.pdfIn PDF document text
    • http://rajamuviw.epizy.com/nebanijivufisegebekuliz.pdfIn PDF document text
    • http://zudoxovup.rf.gd/genius_g750_battery_charger.pdfIn PDF document text
    • http://wobosososozase.epizy.com/westinghouse_tv_32_inch_wd32hl1218.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_off00011f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 5476 bytes
SHA-256: 460e234776f3522e1c0f1926fa6bb41793cb55cab5661515a4fff880ebf053d2
font_01_sfnt_off000131f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F5 10952 bytes
SHA-256: 2d670e69365c9a43991f1248a0cd33486765c8865f08171bf729e769ee1cf737

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