Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fd58266b900802…

MALICIOUS

PDF

75.1 KB Created: 2021-08-15 20:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76971e3c5f8f181f8f113cdadd67f77c SHA-1: 6c4edd07c8f73659f36117dec7393ea8b75ded04 SHA-256: 86fd58266b9008029f517c379e382a60e32e8843e48073c0dfd1ea71ca01654c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and the presence of many external URIs indicate it's likely part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ovistar-dz.com/ckfinder/userfiles/files/28773859925.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/zugovubidimufed.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/61324251143.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/74466366256.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/telolarab.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/romagitilelavanotubinowu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b05b4ec41---mafolivexizudukovotob.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b89adca8b83---54144614552.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/93df1e6f3a6367cd11996fccdaf24b4e/47693942730.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609157fe29523---pijosivamomexo.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210814103900.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/aaca30a0aa7251e66f2fbed0163531ed/nozamixe.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f54af6444aa---51745032635.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/33915133605.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099c82438042---25651286918.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a7182523b2e076ed737215d7d71ef52b/mukokoponubot.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/kebinu.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/92885446390.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5b6a235e---15742025254.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/kininewumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=formato+check+list+de+veh%C3%ADculos+excelPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/cab30dcf9354196bf890412818f5a13c/29120238832.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_off0000bfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB3 10932 bytes
SHA-256: 4e29b3392986c244402bad86fa9ea73a532af89ae58a339f1022e4bb5137914e
font_01_sfnt_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 16804 bytes
SHA-256: f5474a6091ca8f3de6397781c415599ee73994b87f0e70ea9128af89920cae4e
font_02_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.