Malicious PDF — malware analysis report

Static analysis result for SHA-256 76844be41a7cfe41…

MALICIOUS

PDF

65.6 KB Created: 2021-05-31 23:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 480a588db72ef3ebb7530f523310ae0e SHA-1: e5d93b1f52d4b653777a4d409d85d7aa0ecdd818 SHA-256: 76844be41a7cfe41616dc1d0ed0ba157a9d699bb2cf66ca3a5b03628db267b25
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress installations. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/q7ja8d1decg9gtfrha2ddh3kn6/11654353856.pdf In PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1ab376269---pubuwimilozisinujopivosox.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/55362277178.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ktd9q90gm3qk6b30uqd8h6kmgg/58545454578.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/e87ee7719b748564e121556247ad1853/gasezoxi.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4ce3b3325dee72b5ddcba702d9fb843/liwalitakumopapebivi.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/78571100065c8e9866d5042b87c27804/pefuturonivevo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082874fc01f9---88711208613.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/fadonutoz.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f2eb96cfbeaebbafd3a33cf05d869051/70701338271.pdfIn PDF document text
    • https://hgb.se/filer/file/87182190554.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ae3b0c69202d3acbb78a3ded804f82d3/pizusimupixidegepowa.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/d2ad8603799fde585d4155c2b976ee23/polifaluvefefezuxelof.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/7d8cecc334e5385a4e4208815f7b6470/tonezafuzofozesejef.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0732b392f95bc7e784ed5ae581fb4279/46565981155.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/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=portellano+j.+%25282005%2529.+introducci%25C3%25B3n+a+la+neuropsicolog%25C3%25ADa+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_off0000d377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD377 6176 bytes
SHA-256: d655e93b1fa77c21c539e6b196175d952d906d9e6eaa805aa171aa2e2857fa63

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