Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba8b52d9e8306d6…

MALICIOUS

PDF

93.4 KB Created: 2021-07-01 20:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: afcd46f659a0979a68161070f906ccde SHA-1: 90e145a5a94ccda34212eec3a12ed0c8d21e8b0b SHA-256: bba8b52d9e8306d645e802c95eb749986de46a926a0301250c7776d3ababb97f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and compromised CMS upload links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=dishonored+2+mission+2+safe+combination PDF link annotation
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607743d425b8b---67657254049.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/19403491120.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c2bdb09718923f30d9dd4a2c07ffbadd/91268987464.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69528704968.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5ad0c227---9262483884.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160715f634b95b---35164086519.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/16801147536.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079389941eba---66243546450.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ucibcpb0vu3blq4eus9e26orp3/piwanepupolajinu.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/89616650280.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/37672474465.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/hq5i0gb2ifvsmro3v5ca7athap/sijakigamadut.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/eeoq11ksnpvogtjg5r7qns0pl1/wevimejid.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/65121133672.pdfIn PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/bapijebufotobo.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ac930b09---94197402575.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb11700755---88835812902.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/vadizoxugilinisakujo.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083a8ed73053---vomepejuponef.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/d625f5daef3f30f751ef5b79cd34511e/bugevavube.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/23431274250.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/gonusozagedofudebijiso.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/sibiwogadaned.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AC 17004 bytes
SHA-256: d821faaee53012ece920b7760018156d4f53af6ffc6cb4cb667359cebe30c3f5
font_02_sfnt_off00014f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3F 10956 bytes
SHA-256: ae538b848e39b0f1f6ae75411cba6c7e74f3b23fa4f500e111c3812f7ed28697

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