Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd615c6752d9ad9…

MALICIOUS

PDF

65.8 KB Created: 2021-02-25 17:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e14b1e6a4e392eaf4c4220648182e20 SHA-1: ca71f3a7c9fa63ed4e02eddbe94bd9d7133a7c4b SHA-256: 3cd615c6752d9ad98b692d81955968a946096a3bd47028d82c0729ddc19d74b8
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://jottigo.ru/strik?utm_term=rosemount+3051s+dimensional+drawings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481289/normal_60082f6eed50e.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/CjjWjj0/57068120889.pdfIn PDF document text
    • https://gujijuxe.weebly.com/uploads/1/3/5/3/135326775/dimijuxavisewe-bizofezawaze-mozalilum-ritenexu.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/nekedepenowugisetos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fffcffc5d1d1.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/41575.pdfIn PDF document text
    • http://paselon.getenjoyment.net/xazexewibesupixidolasog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_601a7eb9624f1.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/element_elefw504a_tv_stand.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/getumezijoxodo.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/rojalexipokadaz/teeter_hang_up_instruction_manual.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/walker_brothers_cowboy_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/arteriovenous_malformation_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/96952576283.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/minecraft_1._5_2_free_by_anjocaido.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/75245328226.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_off0000c3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F5 5728 bytes
SHA-256: e359cbe6192d04525d3661262f8c571175ed299cff825a4c8e4b801ff034687e
font_01_sfnt_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 9788 bytes
SHA-256: cc21697da03c6490339e89a05de156827b9cd44ba37346987f9928008881fdbd

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