Malicious PDF — malware analysis report

Static analysis result for SHA-256 118934400aa50d90…

MALICIOUS

PDF

73.7 KB Created: 2021-07-01 23:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92d9e087e7b0c77fb11bca01ef5da346 SHA-1: 49dd8ecee7d42b0e6187f7898287f561392ab6e5 SHA-256: 118934400aa50d90b7dc1ec139cfe38643d5b7ccdb7a57b76ae74cae1319a21b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=watch+raya+and+the+last+dragon+full+movie+online PDF link annotation
    • http://shipsupply.ru/userfiles/files/pediga.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/fanune.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863bd3050fe---nemipazigosodoroju.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/f32325b1ca05284e86fde8d578ad1db4/63705882354.pdfIn PDF document text
    • http://slsnn.ru/content/files/45795798119.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/45668575745.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kaqk39bu3pid6ers88ck398bo7/17244551769.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/u1vlvn1hjn2ks81dbqipusngt4/gusozevefogariguf.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/q62b8kt0f1j8v7dhifaabet7e3/48248466510.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fb60b8cb7---vawefewulobovipitiziw.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1622374331.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/frktoadt8qnh8mv86s93fopk54/lerexoximoxupasuludako.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/domotokurilisunoxiwuba.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe12ad9c6a---fewutanofolexunuju.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/7o2q9cacak0gsn859hfdf00d90/venizumaxurapilusut.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/suweluzup.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/rezugemudodu.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/mikonokudarosami.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/28236591693.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/7989377615.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160947fef3b261---39824890638.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd641ae1f70---76729642310.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fadc0c9c188a6e295fc6ea9fceab001a/maxodororelezi.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/lutilat.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_off0000bcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 16348 bytes
SHA-256: 31e9697df540000c1f1a4c770f39352173306e4b6be85840ab0512a42ed816e2
font_02_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 11196 bytes
SHA-256: 8cf442e1079faa950c994a800fdd7bfd28b5b7018b4e4d3bd04037127b7e6cfc

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