Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b06ed4ee6ebd7f3…

MALICIOUS

PDF

71.3 KB Created: 2021-05-18 12:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fff3c96ea6f994e55fd5f2eaa4da66ba SHA-1: 5a7d033fb6853008da41d547de9ec435d9047e50 SHA-256: 3b06ed4ee6ebd7f3be593883be973d4c1c7e055d5b554104cc5b0018cf96086d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=mandala+para+colorear+dificiles PDF link annotation
    • https://telonilinip.weebly.com/uploads/1/3/6/0/136050587/2755050.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/2214241.pdfIn PDF document text
    • https://xududegugi.weebly.com/uploads/1/3/1/6/131636960/39e4e332.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/kunupufinudopakep.pdfIn PDF document text
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/jedegufatedoso-vesarenur-duletejubalizi-lusoku.pdfIn PDF document text
    • https://kapizufon.weebly.com/uploads/1/3/4/4/134486886/fufupulurewaz-golerekuben-fazabudilutez-gubozis.pdfIn PDF document text
    • http://maluxevuno.22web.org/mba_marketing_project_file.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/tidigudetefumof/suzukanatoronegufogoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b496ab5-6dc2-4fc7-b7c4-cd0102542655/37228357509.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/what_does_the_firmament_of_heaven_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5220f201-f1ae-40e8-8c90-63ebdbeb20ab/bodega_dreams_audiobook.pdfIn PDF document text
    • http://telewazikenap.rf.gd/brief_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/femovufowanirugetigebor.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/nofikuxisudimerabigid.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/awaken_online_catharsis.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/atomic_structure_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7248560-4a3e-483b-b935-41fa00f4aa6c/lexijupolem.pdfIn PDF document text
    • http://viromeradog.rf.gd/92970339074.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/guxodewut.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_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 5156 bytes
SHA-256: db2e95dfa080e4283357b6b221421eb4b75f761f03a5f797bee79ccd358554d7
font_01_sfnt_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 10540 bytes
SHA-256: 254079831e603d6b997d74d19cafe3bb77d14eb674c7d9ecd80ce52c45dbe7b8

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