Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2cc4984341bcd9…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 00:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f22db65c76d771912fe5df894a328931 SHA-1: f4f25c055dffa741107a195b835ad9323730815a SHA-256: 1d2cc4984341bcd9258655a34e68ecd4804f35d78b3fbbf5df95f9b35b603662
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://projecthouse.bg/uploads/CKfinder/files/78105988956.pdf In PDF document text
    • http://hidropro.hu/upload/dalokuniluveravejabexuro.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/86768487256.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/dopewo.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/60f2eq4acl7o87u0k03d8eb0v7/40670875925.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f26c773fad7c0db6194ff1882e5fb658/widapiweza.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/25547093695.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161051cce6d75a---fejadiregewimewen.pdfIn PDF document text
    • http://allycatering.com/userfiles/17920036688.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/88921923097.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c248517e3a---pezenesonite.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/3691699187.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b9a9d4b59---12060032308.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072cf5316a71---kumural.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/58668339875.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/gajopuviredefuserejifub.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddadded494---96817630451.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/nufejodosomujisipu.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd96f06054---73808312886.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/99441925047.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/15830936963.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/60172762788.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/letimubosaguvimosupozeda.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb068808ce---2906443219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=handbuch+geomarketing+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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 19548 bytes
SHA-256: 24f17bcb63d84b45c7978fdcda388d31274364f96339bfc8544bf74280fd3188
font_01_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 11176 bytes
SHA-256: fc97a7a1fb3f5917fb3eb95e745ff6a935ebfaca3d6b5bc04a95008d8eb11f6e
font_02_sfnt_off0001203f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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