Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9d9caed4798d0c…

MALICIOUS

PDF

67.9 KB Created: 2021-06-23 05:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 23d6390901c17efba3a912de6d2bd6b4 SHA-1: f1e9b1b601bcd2d4c847735f298a5f15c89c782f SHA-256: 8d9d9caed4798d0ccae4230ee9e432e996cc2154b624f963d896f538f17dc1c4
156 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 by an ML classifier as malicious. It contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of these links indicates an attempt to redirect the user to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/7949f2566aa4554db6401642a7a23137/55833836153.pdf In PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/e4trgo6qovo39ers6lq8bhue45/44639812992.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba71d4a55ac---nopuduseviwugejimupedip.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/55866576645.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089f3abc20e3---babizotexelonukisakipi.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/96366219302.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c8d75a3db---ludujivovarowexew.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abc2ce59a06---ladigodikaberaj.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/merivoxemipat.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/bojezudevabesu.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/45357566558.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/de470f3c161c56a57d15adfe68a6fccb/kinumabasof.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4a689ff52---10879653233.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/batigomanewaxegadeji.pdfIn PDF document text
    • https://andrejc.si/files/file/bokuzovakifavaxosoketikov.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ehm1veuf5t4e0uioaja886r505/36039520788.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/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=sobotta+head+and+neck+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDB 5244 bytes
SHA-256: 1a5b04329b1108c2a1d5efcbdec94f68ad37a6141a199d233d4ae7a7997b9b27
font_01_sfnt_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10932 bytes
SHA-256: a99a13e101dc670114f55b06eac13b5c0e027f5f4e3340c49c45927718f79ab5