Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5969560be545c6a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 18:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b468237fbd5e07cd47d9e290a2ca21f0 SHA-1: accbfa5079557e18399074f594600542b2f6009f SHA-256: d5969560be545c6a6aec9779949e1e506219b3e253c18fc3b613e976b2824d7b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://bradzo-ep.com/uploads/files/43247484945.pdf In PDF document text
    • https://carrieres-pierre.com/userfiles/file/tefevafuwi.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/daxazuxaganefiwodewisuta.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210920_48AC189378227DFF.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/30384c592af98acad98dbd51458fdb42/biwolig.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/zivobudufiparalapiliw.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/juwigopidilotek.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/tegirozol.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/95659061108.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/34031338288.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/fuxapokaz.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe6848e2d8---22265200252.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/dozofiluxugepugineponov.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/4144372166.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8ce77ec7a62adbc0a0193c05987dc826/burugudixogusewuvewodomi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb8997bc96---20265865161.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/xigazamuvelun.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/jezamababuvagapumusod.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090621240754.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/42497947523.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/fivuw.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/49051917879.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/jamawotasukadusoputetud.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/genegirulari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=untitled+goose+game+download+free+for+androidPDF 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_off0000af5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5B 14564 bytes
SHA-256: 77df702499e6b12f95aa4949a7a967e5c772cf2c52babf3513cbaeac311e9adc
font_01_sfnt_off0000d3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AB 10788 bytes
SHA-256: 57af14bd0cf95b3724571300203567b8f273b3c0bfb998a6ad9f1cac3659ade4
font_02_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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