Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea1d32f6b0b378e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 20:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8b965bf660d137487781d84c82f4f309 SHA-1: 3f929b4f763707a337c304e6de9f4fb1eb0034e1 SHA-256: 6ea1d32f6b0b378eba725b27add916f83d3b4509778bd53c2da78f904eb94203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it's part of a link farm designed to obscure the ultimate destination, likely a phishing page or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854c9456b91---somisapaw.pdf In PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d550e3589d---17437501119.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/10967141669.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bca8f054ec2---18690585763.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/7815091797.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3868c26a---84663991171.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/bekozutukuzemo.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12c8d611f---riteba.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e56bf6ff94---tokogaru.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16099e17930287---4838119790.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102b1a172ffb---30093474542.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95c548bed---9483492769.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/dv4lcal2cbh805790ei6l7df2e/95070694310.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8c11071628484d463f045b4203fe2a3b/60668067976.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/48883515092.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/1101e22ad636bfa824b648149b7c65f1/vafewiluzobefado.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2d2aab261---34298794543.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7aaab377c---soselamonanobi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6cc3494e5---903909080.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/17992888589.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/tonibupolurudozelujisuki.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7b7fd153ede30a8bf41592f2511286be/bawaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=charlotte+pistol+and+rifle+clubPDF 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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 18504 bytes
SHA-256: d985ded37713a60583c78b25a35f1e7246aba3343babca3b164e7980d53b9a1a
font_02_sfnt_off00011b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 10988 bytes
SHA-256: 8fdb872b4bb63f56cac018909e5c34aede9d160d2b460bd8353ce1c1b7d7e428

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