Malicious PDF — malware analysis report

Static analysis result for SHA-256 696f6ed931847adc…

MALICIOUS

PDF

114.7 KB Created: 2021-10-10 13:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 88b0b75ecbc62f217fc4b60c18b0085e SHA-1: a99eaf2fc5d46bfb5f8cfd1b461f9c5f1ec36cde SHA-256: 696f6ed931847adc180f6b165b9e8f1f08c9230ab17b3e4315209f90b986251e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, with many links pointing to disposable hosting. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://oniceh.ru/uplcv?utm_term=miss+nude+pageant+contest PDF link annotation
    • http://bekkercoon.ru/ckfinder/userfiles/files/meletitujodusoguzeve.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b076bc76905d40756c58037201055490/21314587122.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/vajaluzexanuvepunapur.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/foselaxavunu.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/29220383520.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/83644509882.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/90408436780.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/pewakadezawuzoj.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/28832443833.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/73825966899.pdfIn PDF document text
    • http://abwrva.com/uploads/files/tepagunomunevozoxapitawi.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/folaki.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/61224334925.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/motawow.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/66161340517.pdfIn PDF document text
    • http://kachelofen-prommegger.at/44885966189.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109072058481206.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/kusilemikuwi.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/wolurinaketaw.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/82899456902.pdfIn PDF document text
    • https://senfina.top/uploads/files/10747785225.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/bidolisezepoka.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/dikidoroseb.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/mazabid.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/jigozazusuzajolilonag.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/40860465066.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/73onmb5m3ckhd06agc2v7veikl/89377556346.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/bofefatunatapumav.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001507d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16894 10636 bytes
SHA-256: 78a300337b0731c684291e9f6c2c13ccd00e0088bd74955e3288a123f1983db9
font_02_sfnt_off000180d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180D5 22388 bytes
SHA-256: 04e62cc777b5399bf74c7ac50a60f9415a0a03190e44f5b2c465dc5c1f15ecd9