Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ed2d9cb87113b4…

MALICIOUS

PDF

86.7 KB Created: 2021-08-08 13:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1faddb162adaa9e3f903f8baa586692d SHA-1: fc37d3a51d26ea92c07e1f837a090e0d172355b4 SHA-256: c1ed2d9cb87113b4882eaf93ca5dd28e9fb7a63140da018071e0a556e079c1bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing and trojan threat. It functions as a link farm, directing users to download files from compromised WordPress sites, likely to deliver a second-stage payload. The use of 'utm_term' in URLs suggests an attempt to disguise the malicious intent as legitimate search traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/uplcv?utm_term=pdf+reader+free+download+for+windows+7+64+bit+filehippo PDF link annotation
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/55403643456.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160827d863812b---40652406316.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/q6s8on1bccl31rtv817ort9vf2/fonojunetiziv.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/98971497414.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/jafawamu.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b2525d9ac---48506462610.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/xojixasikejeferi.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/xeleveruzu.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/cb99d7cd3fb2db1f733221aeae902162/loloriwejevamubi.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f135e713fce401adf99581eda90b80f8/50295918653.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/36e2124bd41e3a96d80da69225357de2/zunife.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/968ec69b4b957f02cadc52ebee57c539/17551967343.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/duruzusefeledurilujer.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/pikom.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16461cc0---kifiv.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff2c9e045---14062506384.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/69677040313.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/fofurogivufotitud.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/71726f00e95863a494070b404bdd4387/basuwigokiwonozip.pdfIn PDF document text
    • https://factinet.com/uploads/files/72839425914.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/muvanege.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/79945164298.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160862567c3d98---jesumufeniwipekakobif.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_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 11116 bytes
SHA-256: b0706e699a1df494e6f808828826fd08368d5f125f59f493f039d59ac8834455
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001207f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207F 16880 bytes
SHA-256: 7e1720df3cd14b76b90ceda7c434228764a34337a05699a41c83c916a8748b2b

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