Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d5818c2d8923dc…

MALICIOUS

PDF

69.0 KB Created: 2021-03-27 15:55:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8e98f90f61a12ef36b8527666cf95b9f SHA-1: e42b21b8125d880049a738e2879ca3b488c8264e SHA-256: d0d5818c2d8923dc53139ac62a074efebeabb2797e39cbd5fc17d1f5e22c066e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely the initial lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=text+box+generator+html PDF link annotation
    • http://carinsusa.info/15122944583q54na.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5fed66fd64714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_6021cd1ac072c.pdfIn PDF document text
    • http://domsale.xyz/18919300792cn5b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_6002c3b385f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_60162ad6a1478.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383930/normal_5fe1ff91dd369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_601f623837007.pdfIn PDF document text
    • http://idealica-ordina.site/89840348925wmxlm.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/jalasilunaz/angular_template_variable_dynamic_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/wigaxuwiputul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd958e24-a61e-4e5e-a2cb-f1e43f3c021a/envision_math_grade_3_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/pac_man_game_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/gufodapowo.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/76285688480.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/clonezilla_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/4181894157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10772fa-55ff-4071-8933-6d397a5fcf20/introduction_to_management_accounting_16th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/46598905056.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_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 5080 bytes
SHA-256: e76fb5d966ac9bd29a2f8e87c0f68dcfac0593e49ea73423c721b1a8d20793c6
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 10836 bytes
SHA-256: 873ff110513bf5efedd565ce0130aae4162c1a3dec0d29e8207f643ef89b9efb

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