Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46a03881f661c52…

MALICIOUS

PDF

59.5 KB Created: 2021-09-08 09:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 234eed8ec2856f9762097256d84ffb51 SHA-1: 9bda7330339b88372d3a2968d86c692e6fd01f4e SHA-256: c46a03881f661c521088054834962a9bc6d11973edc1a339e725857cd29352ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6753

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=tim+noakes+banting+diet+pdf PDF link annotation
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc87b9056b---serisubapidigeva.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/huatung89408fstg8m2b5fjhm3/kabatosiviki.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/nareveduwatakegogafotule.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160747639ddb2f---fosugo.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/30780198776.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/36131871741.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/pc9iq4tikvi1ddg124hjcmji6p/72490207837.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/6827829569.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160848b040fc13---tafipurebokasisaken.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/0dddfe5d01b62ebcea11f4b781dd24a8/bosuwanifed.pdfIn PDF document text
    • http://strandedtattoo.net/file/61108354201.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/22317094841.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d91faa384848df941a3e41fafdb0fdc4/78199298489.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/xoruliridutabu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc67b788e---fibowavadajezuzubad.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a288413d6e6---jepoximevimujowolibe.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161261ff32bb1c---70326534815.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/wimisonogarikuburol.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/cn870skho5pmq20snomp61dkh3/15254448541.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/65375149171.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/puxivagoruwoj.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 10888 bytes
SHA-256: 638813874d1a6352163236780ac75bb2ed5668631865e8eb5b705fd5d3790e42

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