Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb1b060b3c75ca6…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 05:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f284f0b054a712140fd5b37496b72e23 SHA-1: eb8c3f21ebcb24dc9773db0f8b3f4012aea5549a SHA-256: 2eb1b060b3c75ca686798719da3333c5654e2b9f4c5d7418961d132da15398dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/543d546029008523bebe86e988549d3b/12110029567.pdf In PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104d572a7bf9---19582528687.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8bec88b94babebffcee9951c56c64128/xagamamefixanuzunenonogul.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/47e4d4540ac785946ccb9ab57418feb5/zoziwi.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/39874184677.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/a9m3mdoc7ie8ep67iaorjtccui/nebuxotazilopipefoda.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/f50ada81985ca4b6d11feb4b711b7415/66106778820.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/8lgc7pnptogu02cfbndbqbhsea/63450807466.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/rusebemaputezobo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfe7c54797---zafejurep.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/wivuvawejuxekaranatalibe.pdfIn PDF document text
    • https://mackbeks.com/files/file/43477626270.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/viwupix.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/golosipuzugozegonavapit.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/53811164284.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/nojemilofebowaso.pdfIn PDF document text
    • http://nakatka.com/files/file/54767170285.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e012e98c47---zejonalose.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a7ec69f43---saliwovulesoba.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/xixizegupuke.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/27e7051879ea1d7f46a05e15123df1a6/lifewuzobexukeri.pdfIn PDF document text
    • https://congchung7.com/upload/file/wamuze.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/2e511a3fc4a1d8fe1c67f67fc57ce98e/rofamuxomokejup.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/49845192224.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/35770955456.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/15131980815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cortador+de+grama+manual+usadoPDF 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_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 10628 bytes
SHA-256: 93cc818b19ddbe5a25699d486db0c42d04d22120560d025d010a96fdf054102b
font_01_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 19204 bytes
SHA-256: b1a80d3184713a753d4b7a64b70f89cb82ac642343c829d2e6e4caf07ac91214
font_02_sfnt_off00012bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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