Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd5ef952e8ccd3e…

MALICIOUS

PDF

94.1 KB Created: 2021-07-07 02:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a9072342b29e7b6dc671c56e8e2667dc SHA-1: 32bf371620af055a9f71cfac37e0a795f84342dd SHA-256: 8bd5ef952e8ccd3eb1e5db9a84b53c87d65260fdaa47a44d7434562bc2b6183b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are consistent with a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://ketchas.ru/uplcv?utm_term=pickle+pee+ds3 PDF link annotation
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/425bfd4799da9b573b1766a95cf60b4c/81780847387.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b81d6311---wevowofumupenolajotosuzo.pdfIn PDF document text
    • https://ekransamara.ru/files/feromotodarepep.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c45d75a9235---nukumopojidifimar.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d093760fde---rusib.pdfIn PDF document text
    • http://artospace.com/pics/file/61010150970.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac935da5e---jivusopukolixiwej.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/84905248441.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9814237e7c70b50b0a9896bbdf8e8c5a/50601633994.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d2a4b866d---46246809819.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/5eevldgudrtjt2u19s0j0vrcu4/rudememefedusoni.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-21/20210621175106831575.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/farajaj.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/zevopi.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/da71d9673856cb08cc92c5f6f2c07cfa/52599650126.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607854971e312---suvuwoguxiboxagoruteje.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/99670263071.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/bulezejosemuzivaramipali.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/49105345389.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/71853390413.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/93993847185.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2001b74d42fb4cad9c3a0bf037b1179e/56118198991.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc2c7993e8---56249721185.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/69674425002.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/d140affkkn4bf6p7foq7ekrs14/71231876608.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6A 7768 bytes
SHA-256: fb0a2ab768dd5d27fc77a34154315a29ca44495db121084912824868701b003a
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 10188 bytes
SHA-256: 8391491f652bf41eb386ba425ec279fb369ca023bb50cbc3c278f786ccfc8178
font_03_sfnt_off00013d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D69 17576 bytes
SHA-256: e43d4b9d4a81385af34dfbcd7af22e99494c4749cac36abaf27a7d10389bdfd2

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