Malicious PDF — malware analysis report

Static analysis result for SHA-256 066339e5b42d4fc8…

MALICIOUS

PDF

78.4 KB Created: 2021-09-17 21:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e84691901c57cbe5a041adfa4474961a SHA-1: 6fd753846393c8b79b88c2ad7c655c00eb1f816e SHA-256: 066339e5b42d4fc8f996c03b493a1d1eeeae2b781c270a96ec6320698d2625a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://nomylo.ru/uplcv?utm_term=epub+file+converter+to+pdf+free+download PDF link annotation
    • http://tea-ra.com/user_data/upload/save_image/files/bepapifezegasopololaj.pdfIn PDF document text
    • http://master-vin.ru/files/file/pedumi.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/wosoxaxuninejipefodeferis.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/mofetoj.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/koxifuki.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/basonugerewokadut.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ec874e444---48998182216.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/temadafe.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/63022224042.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c0071019c---manuzuvitajojolojiba.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/93327166314.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/89957287837.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/saripelol.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/83484661968.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/82459410569.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/61107917124.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/juvogulovonidanigefagerex.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/danugiguruminanodazim.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/zufotam.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/f4b1cbf6c35da6d51ff3ca185cc1d9a1/guritevomeki.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/kunidepamilid.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/jijesegolo.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/dexesupawopifuwimogogesi.pdfIn PDF document text
    • 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_off0000cf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF70 10820 bytes
SHA-256: a1af9bc6fff4910c22f5b637aa2fe3280fab10be5e6d4f87312b0ff05a713b35
font_01_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 16900 bytes
SHA-256: 08c22cf72c2be89d10786656365e54f01d2057bd3118c9ebf5409f48dfe030cb
font_02_sfnt_off000113fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.