Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2e435bc2c177a0…

MALICIOUS

PDF

74.6 KB Created: 2021-09-03 06:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 85de70b71acb247f77264a8354e23085 SHA-1: f057a73e777bb70303e703db8a2feeaa4f80977c SHA-256: 3a2e435bc2c177a0116fb50fd43dc98f50489a9ecb92f98d241a6d6d79a05608
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://kutscher-customs.de/gfx/userfiles/files/gaxikidijamive.pdf In PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/ksm4ree1hmpjqfib2h2a55f8vk/13680166022.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff53a493edb---11901122046.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/32387441911.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077d078a0e63---42401899128.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/woxawewotewafuwu.pdfIn PDF document text
    • http://rotang.net/userfiles/file/66202891111.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a9c0f230b---wabazexuk.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/mipogidigaladuzegediwew.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/fuzukofe.pdfIn PDF document text
    • http://womenscouncildallasarboretum.org/clients/85748/File/zomimomuralasugazurego.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/96511041929.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/biwemipumoxel.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/vozubugetamikapifemupuji.pdfIn PDF document text
    • http://nnt52.ru/userfiles/file/diludotasepezojef.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/idsu3iepp6uhpbufhsuj76sdss/xixupebalowajikatijum.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/9316065397.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/dapekulevobupux.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/pisisikezoz.pdfIn PDF document text
    • https://servicepapik.ro/files/99415014180.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7bca679756812f2f7d92d59f3382dc87/88807361240.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/biwogeruvesewejada.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-1/20210601072738361629.pdfIn PDF document text
    • http://zuche0551.com/upload/file/najilesivosaxalewimoz.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/fimawubajetunagosaxola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sketchware+help+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_off0000bee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE4 17776 bytes
SHA-256: 973e265f447f58acae416b26739be6b01598998337d2e53e1ae26ded540dcb7d
font_01_sfnt_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 10484 bytes
SHA-256: e2054b9c10151ce02e706351e514a991e6f5107dc54ca80ec4ccf039d2a90bef
font_02_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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