Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eda38bc960beb9…

MALICIOUS

PDF

99.0 KB Created: 2021-04-01 14:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d73c893789dd43c8022fe6c0324ded4e SHA-1: dfac8cd6a7763b2d317df6eff1244180acb673e5 SHA-256: 05eda38bc960beb908211d08c5ac67d3a4a24219096b446681505ce270c72831
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://botokaw.ru/strik?utm_term=d%2527link+dcs-932l+admin+password` suggests a phishing attempt, likely to harvest credentials related to 'dcs-932l admin password'. The PDF also functions as a link farm, directing users to numerous other potentially malicious PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=d%2527link+dcs-932l+admin+password PDF link annotation
    • http://skywonder.space/arm_full_form_in_insuranceyzj3k.pdfIn PDF document text
    • http://monstergym.ru/jekunumi60b3w.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/out_stealing_horses_full_bookdpnqz.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/jakitiro.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/19070775927.pdfIn PDF document text
    • http://espacecmb.xyz/jelipexivunuzudi4j5v8.pdfIn PDF document text
    • http://prognoz-football.club/the_ruins_of_gorlanoc8p4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/congruent_figures_module_quiz_b_answers.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_77d0e21335d04ab9a89947c3bd6561ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27dfcfae-5692-4249-b93b-82172a6a1e6d/how_to_maximize_your_personal_injury_claim.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/15491670970.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/los_anormales_michel_foucault_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/sample_performance_appraisal_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ea83a3-ac10-4150-aea8-31d47b7fbe67/jagogajupazogamufariliki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf95e893-cfcb-46b4-bd1e-50b8bb7639bd/42450349041.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_8142a91e12774095a06176513166d986.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_0630d95c7689482892752f839237bc42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97595788-ec28-4b4a-9e93-17d026088561/e_major_guitar_chord_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/sugirurusutobolaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bcc930-c2d8-4e51-85a0-05c29c7b250e/26497565549.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_74fcd7b947c3416ca508a4a4d5fe35bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2570c30-b761-4f5d-9200-aba01c543b8b/49782692799.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_off0001407b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407B 5892 bytes
SHA-256: b6bf924bdc94b8ac4a18ff0710cf5fa0e5b98074146ed3f80155d16e16463e06
font_01_sfnt_off0001548d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548D 11920 bytes
SHA-256: cfe84b1244841285347a3bc1ed42890c12528c109dafe9e42b7bf3126b51f255