Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93ef490a5290dd5…

MALICIOUS

PDF

75.4 KB Created: 2021-02-13 22:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 700dfe66712f7030f440b12b73394f85 SHA-1: 7f32ae3f98188436f004965da5a3ffb939a3d3ad SHA-256: a93ef490a5290dd538b632296186cc5c375f6dc51896b1bbeb7dd2f2548c6ff3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, with one pointing to 'druttle.ru', suggesting a link farm or phishing attempt. The PDF's structure and embedded content are consistent with SEO manipulation tactics to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://druttle.ru/123?utm_term=monster+led+light+strip PDF link annotation
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/dusanovif.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/fatedakemedovawidin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_5ff2abf93c2d5.pdfIn PDF document text
    • https://lirurofimel.weebly.com/uploads/1/3/6/0/136088330/2740492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_600ce025d2c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_5ffa9cb2ee93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fe64ec906c3e.pdfIn PDF document text
    • http://zijiwox.iblogger.org/83434702657.pdfIn PDF document text
    • http://vebilodugisugod.iblogger.org/bumifipew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5ffb43f52bd54.pdfIn PDF document text
    • https://pirogitemaxo.weebly.com/uploads/1/3/1/0/131070842/guzemowegukoji_vusimixoja_fajexozex_belizida.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/jawusawar/free_landing_page_template_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/hospital_biomedical_waste_management.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/2018_full_year_calendar_template_excel.pdfIn PDF document text
    • http://gatinilub.epizy.com/baskin_robbins_job_application_form.pdfIn PDF document text
    • http://pibufesoxol.epizy.com/64869136898.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/91166974536.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/sevewepuzudutize.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/todulidisusiwatezobajifav.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/biblical_timeline_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/lipedema_treatment_guide_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/megalovania_piano_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/79084095029.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_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 5016 bytes
SHA-256: bfaa1f8265b41430a5fe30a1deec6e0fdb0a0ee2d06a0843251767c59dadb3a4
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 11788 bytes
SHA-256: 9a19585aeba5692a350de45822ce11b6ad94b5637e7695764837131075f67c0f

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