Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c58801cf8a2092…

MALICIOUS

PDF

63.6 KB Created: 2021-05-10 02:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21561f4f7a93c305fb52bdb87a533b08 SHA-1: e16187d1acb2c4bad25162918ead5509f6fca478 SHA-256: 15c58801cf8a20923dfcd47819007eaf6e639d616d42d2f5ba8037070fb42c84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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 http://dok-vo.ru/userfiles/file/vevomiwirajubodevatop.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbfec9b336---14768481527.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee50dc96dd---juxop.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/65e4df5e347c6cb9be20816f0cdc90ae/tapositakonuzaxuv.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160738a804a695---90809742571.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f95d13b3---sojumemeta.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8e9be55f387344bc679e88676288f8e0/30832341498.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b565b38493b75b842438a580cec2c03/zozurafusabuf.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/15b0f79c8bde62a11048b86066b86596/bewejofizomanogebosetod.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0b3a23f04---kijewizetifitumixu.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/0f765c0078617d6d8b77d40b79b3d6fe/buzawisi.pdf
    • https://medtek.vn/storage/file/73368905283.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d90e50de56---96650346880.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/4e14700592b278115d106389903695b7/lonodogixipasaris.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c487de98f2---82346066226.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb69a3c0b4---pezesowudu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3f30abcf---mizarakidawolanupa.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7d5b9d7e6c5bb485c456ed4f8c6a650d/gemokifobojoruvubadogese.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=free++template+powerpoint+science
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f228.bin
cb793232b83d341810e147a075c5e6b9f4c061e115fb327388669cf3853f3428		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 5128 bytes

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