Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0cc84123e0ac2e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-02 17:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 685171324e8170381221cdfea74d2bba SHA-1: 49a7947335d66ff6af47dc2ba5d7f01a41e6d859 SHA-256: ee0cc84123e0ac2e5cbabe4f5cda0828632baa026d60664ee0a2e641cd4461c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a likely attempt to redirect users to malicious content or phishing pages. The presence of embedded JavaScript suggests it may be used to execute malicious code or facilitate the redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114785fc8cb9---wubalelivitawozigoziwi.pdf In PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098269c43e8b---vonudatotepomu.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/24693584460.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/47544133479.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/mitaxunawanojajeriv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85cd1ae0b---59534128694.pdfIn PDF document text
    • http://valosagoskincsesbanya.com/upload/file/fivuvorujinojoxikawukemox.pdfIn PDF document text
    • http://mesterek.net/tmp/5391080103.pdfIn PDF document text
    • http://strandedtattoo.com/file/95414377842.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/55531346370.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/hv2edgoe6a5jjm4gjbfsuof725/fekutukatisegezovufux.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/65622668273.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dvfbk1ev6hr6fqg5judvs2i6aq/93358141841.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/80542048295.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/puvonumagonitinidinazoz.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/fufozawavakoj.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/d7eecb689f5c97bf243da3a7ab4c1acc/supolawumevuwomekover.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608971a7a1423---34836014976.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210716_0BDFE94A362BDE07.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4b1bed92d4044a99cc13600394ba9142/pijol.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/dobozumupomoxirosilakana.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/12008261295.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed34c41e8b---32294046047.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/mezifotezujugomunibed.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6e8ec6ddb---90391137139.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/8uulesc872dkrpegsillc8tbk4/juvelodimovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sceptre+tv+32+inch+manualPDF 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_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 17780 bytes
SHA-256: 39a8d92447a2756cb1430c10ae65347f7bb538b40fd0f6fa0e736df9f608f51d
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10884 bytes
SHA-256: d9f47ec8b6eff33d6394f012563d91cedb5a5ddead479d2c2e36477557bc1976

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