Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9eae747ae400240…

MALICIOUS

PDF

83.8 KB Created: 2021-09-26 09:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eaa775ded8e4896d417a70a28f7622b6 SHA-1: 9758b687998ebd9e527bd4d272feb239adeff303 SHA-256: b9eae747ae4002408dd5db67e37b130c49093fc5db0536e3776c1180a304de32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=c%C3%A1ch+t%E1%BA%A1o+t%C3%A0i+kho%E1%BA%A3n+google+cho+android PDF link annotation
    • http://fuerst-architects.com/uploads/file/lumazadesenelakitibijeza.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/lararufurotasobuzo.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/93753665723.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/54802152195.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/95350402533a7b51bd8b253c71788bb2/sefiwilewavemisu.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/ranuzonamifeluzuzeloxaso.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/43678188548.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410575c0a4d---9549140563.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/jagepowitasafemap.pdfIn PDF document text
    • https://aedwea.com/upload/foto/silapixed.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/25963926637.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/zurisudiwiporekapuno.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/37631266663.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/xuwerubolos.pdfIn PDF document text
    • https://aokman-drive.com/d/files/damogumomavozu.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/gubafuli.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/ronaniwugipigutiwev.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3b6fa05fe---40245273450.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/71245693504.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/af97e7d63f72ba6159d900a972c07277/pivesesavidapu.pdfIn PDF document text
    • https://www.ewdel.cz/ckfinder/userfiles/files/18984767679.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/58568447749.pdfIn PDF document text
    • http://toroisg.com/public/images/files/xudefizax.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/detopavatapekiz.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_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 11412 bytes
SHA-256: 7a922aa54060e81753f8502900cc6c00dc36589f5a5a921b2590b14fb1680c0a
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 28840 bytes
SHA-256: acf0c58bedd13ae5e17c9379cdc9a0259fcbf241024e6f0b4537e8a9dbfedc29
font_02_sfnt_off000126a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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