Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca7c16bf7ea507a…

MALICIOUS

PDF

63.9 KB Created: 2021-06-19 23:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f0e9c26f4787c0287a5b6d8613c4656c SHA-1: 66a38e11d96b946b3ce459388e99f49a745e6e42 SHA-256: 9ca7c16bf7ea507adbbc8f60d4ddf1d414c37458faaf537467d0ba8587b819f6
154 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites hosting PDF files. The embedded URLs suggest a phishing or malware distribution scheme, leveraging compromised infrastructure to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8461

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://refour.dk/wp-content/plugins/super-forms/uploads/php/files/00edd61a89a80025acb5896660114a76/82674992818.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/jiu69egfdrqpqvoevsggfrpf15/21543500774.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755d29d592f---18071164800.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4702fa3d---31671298166.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/wibujevojedozojuja.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/2471e972cf03e11d446ae1d55968794f/7818183872.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31004538c---mugib.pdfIn PDF document text
    • http://indecomavo.pl/inc/67938744302.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/56457390757.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a263dbec---wexubuzowokadap.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/68237ce6d49fde410f1a81d89d79b66a/63516952121.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/db9ms611q2m1bemust01a9dg0u/11872250469.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/dalilisajijaxemiwisadis.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/4ntk50up3k3jjg9akbbmsqj3l5/wutoviliritakamevamiji.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/6b06b4e246e385e1363fd19331a606ce/18441379493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=working+capital+management+multiple+choice+questions+and+answers+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 5864 bytes
SHA-256: 9a44da997a1f964f223f3804ac9d7136934577ad654d85bb9df30bff77cae7c2

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