Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee4e8150e5b82a4…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 05:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2f472e06a05bcb36760fd5dc9971cbca SHA-1: 5b783efb75fafaf9e96483f462309e96c4f5b6b6 SHA-256: 6ee4e8150e5b82a4b3703ab66660f1afc5936ec055f9d7b2788bcbe6753b45cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism. No scripts were extracted, but the structure suggests a lure document designed to lead users to external malicious resources.

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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b848b48a02f---lafer.pdf In PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6c6a63231b84765b464a4611efe83dd1/64675723806.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/41819eb7208c025adc0f286826af60a8/jatesudopulumapijerunox.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/wepivukipibojuzali.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0e94c7aea---6233398850.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93b162f71---50012789897.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/moloragipidovagewesifoju.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/mbpofjhe96ocpdcs1ca8dc6nak/vofepekelaliva.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///12842803051.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/zutikanoju.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160851e04428c3---70020024269.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094653d35c7e---31079652783.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/14602083230.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/nilimenerajegepiz.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/lopagapafekizaporarekagep.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16202061078605.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/lifafurili.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada1b523172---morugariguxuriluva.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d23bdf73c---gawemubafezabunetub.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/541854d15ae7999b0564bb6bec577e36/21877981474.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/watuvojediki.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/rukufilijifelofeper.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c5e8628df---76356175221.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/16e5e15fd6c619cecef2d30697b4bfae/zofobadezogunigusevawiri.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac0d45879---sigifujalavemigonuworaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=buku+linguistik+pdfPDF 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_off0000dfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEB 17764 bytes
SHA-256: 9623f465ae9663e29c4675a157b7070871509573b67dddddcdb4d1f89b5f2f23
font_01_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 10404 bytes
SHA-256: 35970e27b5558a9dc35f5939aeadf4c7a5bce82c1b564eabd85654d4478695d8
font_02_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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