Malicious PDF — malware analysis report

Static analysis result for SHA-256 0466d873a76efdc0…

MALICIOUS

PDF

105.4 KB Created: 2021-09-21 10:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2095140a5f18e97a00c89589c8c1ea47 SHA-1: 5ecd8d40581d84fed7afb49e6d61f35992af39f2 SHA-256: 0466d873a76efdc067f9c4f9c178b072e97538c2bfa5fd0ad8568aa0c0d259dc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5847

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=pokemon+heartgold+rom+mac PDF link annotation
    • http://www.stemcellhairclinic.com/files/files/55562035030.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/ninirotajo.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/78548814318.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/96493405603.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/sikuzesozowafutivedugadup.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210907_E3D92084276AC481.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/bazapesozazonif.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/93648939510.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/45757629699.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/worogikum.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142414c0a0a5---mowavavatup.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/2hbbjtga7lj32fp16mqlj0lbg7/68506304004.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161477bf80d577---86637043047.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/majuvarexomozadatut.pdfIn PDF document text
    • https://uudanbury.life/files/file/3448305666.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/79daeaf9708ecdab986a32f4aba37c71/70609600086.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/sezukuguzomarugisupaj.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/268c112a21a04fc018934d37cfa8c9b8/zuperopenirema.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/51693863414.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/31081930110.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/81347414982.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/daxedenamikuwejed.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/31665766114.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17063 10652 bytes
SHA-256: 06187ae1c34945161b579a62465af16915f7a00770047abf8b859328366c44ce

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