Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d5371ca588fde7…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 15:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2cc9fca8320d11a8d7f1bae79791bc6d SHA-1: 107143767bd3bf393210143901ce60ecaa8c2bdd SHA-256: 02d5371ca588fde70d8ffb4763c1c49f846ad534e4f2705cf835f4e5ea3d6f8b
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fsanaq.com/upload/file/210916110019614584ggi74tz9hb2v.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614090d542f57---voxilagofogexuli.pdfIn PDF document text
    • https://samowar.ch/upload/file/95266431895.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f819791ca8---99957165346.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3b08212c1---76803795104.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/lesevujef.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/nitotowitedobufibijufaro.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/sudivojaso.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/xijanosuvegavazixagodiz.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/xozekaturaparazuta.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/50293887151.pdfIn PDF document text
    • http://presupuestos.pavysan-bigmat.es/ckfinder/userfiles/files/tosasoxezeger.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/70756455634.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/xelitapabofolabiverison.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/21763469847.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/savuzamoto.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/vifur.pdfIn PDF document text
    • http://moneymaker-gold.de/files/16098855122.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/69829820241.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/gakuxasetumokan.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210908142030.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/dogabigonelozugukakajilar.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ad9p0skkftcen5c10u79p4si30/10810329605.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/69418835172.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/14655051693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+transfer+photos+from+iphone+to+android+laptopPDF 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_off0000b4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E0 15104 bytes
SHA-256: b9a1c752e204778e359efa3048030480a71212b4a5b8047b12b8ef5bf997f03e
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 10840 bytes
SHA-256: 10a3395574fbc5429b145b271f5a98fc224d96803e55f252022b56d936c96d21