Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b0ff9aa03168f6…

MALICIOUS

PDF

102.0 KB Created: 2021-07-07 02:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dd751234d53458bb5f2dd7c460997934 SHA-1: d49764c55161b22891e988267870636737946832 SHA-256: d6b0ff9aa03168f6090ba498060e961214e8a30580f19177e459856bd7257a13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or appear to be part of a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 http://vinag7furniture.com/app/webroot/files/editor_upload/files/rakifij.pdf In PDF document text
    • http://www.aluvascientific.com/UserFiles/file/wipatudirobugosobafugat.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/55245532230.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/gotugutosadatuzupepifab.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d2f59ca8e12687761c05c54816f33f86/77163032444.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a248b4bc44---39892063542.pdfIn PDF document text
    • http://coffee33.ru/archive/file/jakaxesadivukedemavuvo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ea733f251---72400032185.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/29162601299.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/531dd3a10b8413dec9140e6657ac1aac/94630873231.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/n4fi06ojqusi6spa532jm0fcm7/ruxumuxawenabefo.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mejamoz.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e07daec06276a9f4d7afe5426cd72fef/83609391410.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/fozowav.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/47453711319.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/1a11af991f707b6315671374ae488435/tanudijufo.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160733d83f2ca8---tagomu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/27fa4494f6a561ec87b75990689ed158/38117313135.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/ludusiwonivug.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/19586654007.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607995340814f---dadalizixadekox.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/2cb7eec6dbda5d82992bf1de754d4135/ponotapugaregilato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=incentive+plan+template+excelPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14635 10268 bytes
SHA-256: cea68095be160498d0cdbda3c1bd018b30de8399b2a3c4017a01721952afb5a2
font_02_sfnt_off00015d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D43 17340 bytes
SHA-256: 0e6a38a6c9f6d9d0a23cdc466a13afff5f4f8865e0d4339186637f78c294a089

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