Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6fc6fdd5e9ca20…

MALICIOUS

PDF

70.6 KB Created: 2021-09-01 08:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6706450e7188ac15f9ca6968ad68aa18 SHA-1: 7bfbfe63aaa05eba645ca99be37a2240d915b812 SHA-256: cd6fc6fdd5e9ca203bac6664d53c92b7c2fbc11051aac1ba4a3ddce3d95e2a3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://infrive.ru/uplcv?utm_term=steven+universe+the+movie+full+movie+free PDF link annotation
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fdeb71ee5---19262910860.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/felabofowatikuk.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/57fd9e6427e6781422c4f2b2cc08437c/voweturilegepiwemozejak.pdfIn PDF document text
    • https://aaaxxion.info/images/file/46636818842.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fucc14u6b6huqaj5onvnc047n7/fizafefajisizidunomeja.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160878186ae83e---nalonaguzomemegolabunel.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b29ee7e6acc---37107892591.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d50c98830d790a72c712852ece2fb482/texuneforome.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4ddd30661---xagiziteganadetug.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/96817833085.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n4qtfpqtt4c0rlg87m9g5nhs33/63864290838.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/531fa30a4c6c3a02c5e76f4af03bf93f/46626639782.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/90174792605.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad993b1cea9---dibogadukabevajaxeg.pdfIn PDF document text
    • http://tatnhapkhau.com/ckfinder/userfiles/files/vusisutodudubafuv.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e69b4f724---17903809953.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dfc1e1919---dugorel.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/d28u33uuieb508v0msg5fobogf/revifamevan.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/fobegijofenanebemugatok.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nr6cnqq1hf36k9dnk5bmb9qnns/66203164277.pdfIn PDF document text
    • http://travellerisland.com/files/nafanubofokakaziwadonuk.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/24790247068.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/33tkmmk679or437djb8io77146/86110709906.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_off0000b5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FB 15144 bytes
SHA-256: a9fb9ea4e31b88e64fa00d2463a6584abe6879e14f6f5a947b8ef9aeaaecc918
font_01_sfnt_off0000dc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 10560 bytes
SHA-256: 5a213d8811da9c6f94315543fea130b03115fd42034f8036104a13f9d95f16b8

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