Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c7c6c000e72877…

MALICIOUS

PDF

72.1 KB Created: 2021-06-01 09:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7456ce68d2459493a7c890675a0d90d8 SHA-1: 7db7a917936e26eec717e11e9e9822ae31772179 SHA-256: 01c7c6c000e72877ec2d55e188d4a53a9c6add23ab8a6d22b882236cb616bad9
126 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 phishing or trojan threat. It contains numerous links, including a primary external URI to 'https://nomylo.ru/pbw', which is likely part of a phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to internet speed, aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/pbw?utm_term=what+wifi+speed+do+i+need+for+netflix PDF link annotation
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/a5f18.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/jilenokul.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/midonezikudesudeto.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/6049381.pdfIn PDF document text
    • https://rewapukin.weebly.com/uploads/1/3/5/9/135961798/xesur.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/gakakevi.pdfIn PDF document text
    • https://gexemuxu.weebly.com/uploads/1/3/5/3/135394015/9c28dbbc372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziduzobif.pbworks.com/f/sarusudoratu.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144439098/potutoxekipumedaz.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/43030586476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782115d2-5654-4a20-8065-a9892685a509/nuwiketegasafi.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/76952151318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9471b358-d775-4bfd-8ae4-da4b68906a61/cuntas_y_cules_son_las_comunidades_autnomas_de_espaa.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144425007/cuanto_es_tres_octavos_de_pulgada_en_centimetros.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/34808297370.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/is_eating_too_much_fruit_and_vegetables_bad_for_you.pdfIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144445473/winosofatuw.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144435951/kupaxugovivixelinu.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/nadetofojomotikotebupagik.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144412419/quality_function_deployment_and_six_sigma.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144424008/food_dudes_catering_menu.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_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 5304 bytes
SHA-256: 87dcf767d499a491e73f6cc03b1db3027bd756a85740ee18827036a8c3fef78e
font_01_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 11280 bytes
SHA-256: ee755d3e44e9f3b8368402fd8521a37e381c024519a450649e79d6ff42d996fe

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