Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4b27686b8426bb…

MALICIOUS

PDF

76.0 KB Created: 2021-08-28 02:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22ce49783c69799c676f636cdea73458 SHA-1: a2b5ac3d4088ec1e95176976f1395306e053760a SHA-256: ee4b27686b8426bb20ff18e32b916b688512e66826cab9366dd45adabad1e5b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous compromised WordPress upload directories, suggesting an attempt to host malicious content or phishing pages. The presence of multiple external URIs and a link farm heuristic indicates a strong likelihood of malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160741df62e4be---mosovofasuzojonukiv.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rj5c0nlde6i1dncsv2026vvcv5/dowelusujuvataf.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f3a3bc047db932016d900b5220a87099/87649809572.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609648e90ed1e---gunetawiwelijoxe.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/d83nsefc48aq084fs1ihcs7v7o/lobakobanutixide.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a0d09daf342108c108ba6685bf35eec6/xejipobibegoropedaribopo.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/lamalax.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/95110100931.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/81986116769.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/gobotisubetisavanenupo.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3n61v0u4uijq7svftkje7o108m/36765366804.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/233de4383fa953684170b74eb9352f8d/vavovugesaz.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d4272341c---widuzajoluw.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/debinegutemano.pdfIn PDF document text
    • https://nevisnews.com/userfiles/tekobirowusugitezedel.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2f997435---vatikugoledavudenazojenef.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/kusano.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097dd888f740---38237905006.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/39730540718.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/14223901169.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/57456322702.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/giruraniximumeliduxerobo.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/litegetifa.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/fokarakuguli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=biogas+upgrading+technologiesPDF link annotation
    • 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_off0000c7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCE 10948 bytes
SHA-256: fc072e877829dc6bb5bd772be97ece8b919b16ca9f5de9c0e9a484d4eceb74f2
font_02_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 15764 bytes
SHA-256: 06519636012db1668f26ecf3157c5ba23089d34fe32a076a49c5ecc7b5e20821