Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b7306bab84489b…

MALICIOUS

PDF

91.3 KB Created: 2021-03-22 23:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c758b14cc0b4798703a38120158fbf SHA-1: 698f677c264bd03d9a3264acaf9bd8814a5151ce SHA-256: 92b7306bab84489b85f3f2c05bb83543ab52aa98aa044a412c89074ba9166f26
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed for SEO manipulation. The primary external URI points to a suspicious domain, vilenefex.ru, which is likely used to host malicious content or phishing pages. ClamAV detection and ML classification further support the malicious nature of this PDF, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=the+colour+of+magic+movie+watch+online
    • http://wolorafo.22web.org/64323383180.pdf
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ffe038ad03da.pdf
    • http://mepanawabopod.22web.org/the_dark_side_of_the_light_chasers_download.pdf
    • http://subikizivuwen.22web.org/papofurigimeforu.pdf
    • https://cdn-cms.f-static.net/uploads/4459467/normal_5fd8267cd8f81.pdf
    • http://leninuludobodu.mygamesonline.org/bsc_mathematics_syllabus_delhi_university.pdf
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5ff15e3d9f419.pdf
    • https://cdn-cms.f-static.net/uploads/4454043/normal_602b82576e34c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/padosumifubobo/newelitovakibabonade.pdf
    • http://jokosen.atwebpages.com/libros_apocrifos_del_antiguo_testamento.pdf
    • https://s3.amazonaws.com/fapaga/viper_car_alarm_system_with_remote_start.pdf
    • https://s3.amazonaws.com/naxozelozude/86534517839.pdf
    • http://votoromuw.epizy.com/xozenedunurazofunelojur.pdf
    • http://mifojizu.myartsonline.com/85682599775.pdf
    • https://s3.amazonaws.com/falevi/wejujin.pdf
    • https://s3.amazonaws.com/kugelilizibuwum/62785872272.pdf
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_faf32fa0eef74c3d9b87ce9be9c95ae5.pdf?index=true
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_d6b7438b59a74b1d94f35617a5d8f9d4.pdf?index=true
    • https://s3.amazonaws.com/tuxalowafokuvo/jujikalisetiv.pdf
    • https://s3.amazonaws.com/fosalizuzu/tixixozoboxisozisebujusag.pdf
    • https://s3.amazonaws.com/kokesatodixon/michel_de_montaigne_essais_des_cannibales_lecture_analytique.pdf
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_a20e0348281440ff95302c9bd78aba2d.pdf?index=true
    • https://s3.amazonaws.com/bogeguva/wifekunesuxeruv.pdf
    • https://s3.amazonaws.com/davolazupivowi/toshiba_regza_42_inch_2009.pdf
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_e824cff026044b59b1ee1cd8a5f757a7.pdf?index=true
    • http://raduniti.epizy.com/measuring_atmospheric_pressure.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128b3.bin
4cf70ec032a199bb2e6799e70a7111b14ef068df00084cbe2f63750c7c98e3bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B3 5220 bytes
font_01_sfnt_off00013a5b.bin
c8a838074c8101fe29ec35f08b71ab968d7f63f6f789fc9d26b1ee3b7c28f9d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5B 10940 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.