Malicious PDF — malware analysis report

Static analysis result for SHA-256 4801c103cd87e208…

MALICIOUS

PDF

89.1 KB Created: 2021-07-13 00:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ea02d50b8fd9a5f15dcf6e498d24cbe3 SHA-1: ee367dd8c54144520ec52cb31a16f8ce9eab158b SHA-256: 4801c103cd87e208ab054a7ad34e19c90cec3a9a13478d1b02c180a3cd529c98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly flagged it as malicious. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing content but serving as a vessel for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://bhsbeacon.com/FCKeditor/file/46635537237.pdf In PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091c7b79f0df---zanozakevasizisavawepal.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/niguwudojezexa.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d49d7eafb31---18603262246.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/liwoxadejij.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/gomap.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/32578383504.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/sjqqtt2naag2edoluhssl8d014/kurebes.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/jasezudokeralegiva.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160754d3c5ee51---zigejawesukujefagavu.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf2679c1e---63919640496.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/18384636295.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b3dd2a53754829bacca5e47aebec8809/kekaxal.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/38413493711.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073c20396f35---tafidunibotisinewavujo.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/d1ddb1ceb3112f198cf230207ae4f328/92302378503.pdfIn PDF document text
    • https://service-panev.com/userfiles/lerixof.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609099adf0356---xugagaworekosuguvobu.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/23944157357.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a8c7398496464e0b8469b33f199db896/57387854810.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be3d62d808---logufoveno.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/98317649657.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f7755a72---98390498202.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607934c0b5309---79920279356.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/gewewubajelexekulerore.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/iimer9u8k5l8bhpfkjoed5a4qr/savometujozema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ganong%27s+review+of+medical+physiology+26th+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 16288 bytes
SHA-256: 885814aa4f833cdd46bbc97eb200843e13deb7e1b074f246b51ffec7dcea483c
font_01_sfnt_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 11692 bytes
SHA-256: d713ff4bccb63d74800a17a644e894043aaef83bffeaa436f1da0431e79ae0fa
font_02_sfnt_off00010545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10545 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 2464 bytes
SHA-256: 88abbbf64b536d8a7ba89dff74e870cbc865f4878edb0695489c96eaf80977ae
font_04_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 17908 bytes
SHA-256: c60150e95d59622a835ed5bb55dff14c71582f46d9ebd505e714f28f9f8cf3de

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