Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26a9b77a0609d10…

MALICIOUS

PDF

64.0 KB Created: 2021-06-09 00:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ea17408215f1c1d61e42675bf6de43a5 SHA-1: 722dfd5fe60f167621e73a013beee3c383abeeaa SHA-256: e26a9b77a0609d101a17ad27722f3065dfeb02c0bec092ff60ad1a8f3c95bf79
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing campaign. It contains numerous links to compromised WordPress sites, likely serving as a distribution point for malware. The document's content, though heavily obfuscated, suggests a lure related to downloading a Windows 10 activator, a common tactic for distributing trojans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

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://queure.ru/uplcv?utm_term=windows+10+activator+loader+download PDF link annotation
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/48s4dopv3am487srak3d6eovjg/kutabejasokutizilube.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fdd9bfdce---13564283509.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6c407b4d---54577091722.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077f37fda77e---87955164592.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160877b704c90c---fopobufob.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f25d5bf7---xijemolupeguratipo.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/cebulj8vnk0vcn20c25aaf946q/56280655136.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/59603851859.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/31869773343.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f37db84bdeaf90feac0a8e90379cceff/tuvekajevitajipavafubuju.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/nulagisura.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53c5f17861---27293076262.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/bebetenoxizoxajawosoro.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/cd10527773a9f58acd7f8b6d9fa9546e/4813826966.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607869353b8f1---32691447723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 5292 bytes
SHA-256: 8091bdeab4c575c747e65ae275454a303b10b757ba5dac76d46e1d882ae35de0

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