Malicious PDF — malware analysis report

Static analysis result for SHA-256 088efb6b6123e721…

MALICIOUS

PDF

75.6 KB Created: 2021-05-05 10:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26625bb36efd847673b9f8a0605b4876 SHA-1: bf913ae55c687dd43fd764d98d3ec63798058329 SHA-256: 088efb6b6123e7212db1f9eb633984bedead8e43700736ff390f2a35f3efe59f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://midufefew.ru/strik?utm_term=nine+knowledge+areas+of+project+management+ppt
    • https://cdn.sqhk.co/gamakokub/WhaZ952/kakogitezamugadegifus.pdf
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fe43ea591d48.pdf
    • https://cdn-cms.f-static.net/uploads/4404723/normal_5fdaa92806de2.pdf
    • https://static.s123-cdn-static.com/uploads/4448713/normal_5ff626685d776.pdf
    • https://static.s123-cdn-static.com/uploads/4501963/normal_60018058e6f64.pdf
    • https://static.s123-cdn-static.com/uploads/4452161/normal_5fee71e8887ec.pdf
    • https://static.s123-cdn-static.com/uploads/4474170/normal_6005f8e4b2faf.pdf
    • https://static.s123-cdn-static.com/uploads/4483608/normal_6004ea186a509.pdf
    • https://cdn-cms.f-static.net/uploads/4366400/normal_60692ac697810.pdf
    • https://cdn.sqhk.co/towinomer/Njbijap/naxezeguwux.pdf
    • https://cdn.sqhk.co/bafebolabefo/jsD8Vid/1868562185.pdf
    • https://cdn.sqhk.co/wofikubid/CMicZqQ/fedumunefisilajevabuvogam.pdf
    • https://cdn.sqhk.co/kakezesarop/dS2hdgi/11484590110.pdf
    • https://cdn-cms.f-static.net/uploads/4469634/normal_60104af1ceea8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f53f1424-8913-499f-b145-932f4cada6ed/1_year_bible_reading_plan_2020.pdf
    • https://uploads.strikinglycdn.com/files/6a8d06e0-6e07-4d4a-942b-dd1f07e46096/flat_belly_diet_menu.pdf
    • https://s3.amazonaws.com/fenatagazise/hansae_co_ltd_annual_report.pdf
    • https://s3.amazonaws.com/gusule/scansnap_s1300i_free_download.pdf
    • https://uploads.strikinglycdn.com/files/fefce458-f763-48bf-ac66-9e0ef5473b89/thermador_steam_oven_specs.pdf
    • https://uploads.strikinglycdn.com/files/de501cce-1b4c-4ff1-abe0-f5e592de822a/7259850661.pdf
    • https://s3.amazonaws.com/nonabafat/tapofakakozupekub.pdf
    • https://s3.amazonaws.com/ximupuv/vixej.pdf
    • https://uploads.strikinglycdn.com/files/66685be0-3c50-4eaf-bf34-4c2cba3a4a2b/is_it_worth_fixing_a_bosch_dishwasher.pdf
    • https://uploads.strikinglycdn.com/files/3027ccd0-5a9d-42b4-8cde-4af2ff3b37fe/how_to_write_a_conclusion_of_a_persuasive_essay.pdf
    • https://uploads.strikinglycdn.com/files/f5144537-36a2-4f2b-8b72-5f4a4e27c69e/sat_reading_passages_types.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_off0000ea6a.bin
50aa6dc0ea8b2c527a502177b85be94ecacd0bac16806d62bf6cac41abf450aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 5676 bytes
font_01_sfnt_off0000fdc7.bin
3063298893e316f4cc83aab140bf799c698b9e9fe4b87159567c8742d4318456		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 10344 bytes

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