Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeeed24fd3540d8…

MALICIOUS

PDF

90.1 KB Created: 2021-08-06 23:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f81bec8f15837da7650b3675bb04ca9 SHA-1: f851021d40534a7a696c9baa0cf01dd714f9361c SHA-256: 2eeeed24fd3540d8416df61252ca4806cf071593cb1bcaf12f1af6fcef9173e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised CMS upload directories, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medvor.ru/uplcv?utm_term=simple+month+to+month+rental+agreement+florida PDF link annotation
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/1ef2d8b8d735b5556b6d0f250a89a8f0/30886638563.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/85193237377.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/6s7jbbftn7nd0uss8m8k23djl6/sufarafituruta.pdfIn PDF document text
    • https://fuoriscena.eu/file/vixexewipitexa.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/34163671842.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931ffbcb76e---gisumogezidixipigimebiji.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/p53kpf1a68ekjbdvgck5hd77hf/gerovilijomewejaruru.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/pepivadasetawej.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff79f3a556---jojumorawiwuvinu.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/4d5351de46733aad810ec2043d122f78/dabuxufoditun.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f420c1d214---jexasafimunekirorotanuzad.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d1f8e2150---99344285091.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/jebizesifajopixano.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/pesuzijajenasejo.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160738a010a077---repofupomutodovud.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/51674581101.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/30900920099.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f858025a85---13040361476.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/21614470732.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/37345332817.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/69968716156.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f487e22634c---17551331056.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af938d01f37---bebidonanaxukevutotodikog.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a2140353---65913691768.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_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 10852 bytes
SHA-256: b7f91f92c02bc05d5298b08ee9dfbc5c3937ee0de8e7460e3112bbfe483f8a78
font_01_sfnt_off00011310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11310 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B22 17476 bytes
SHA-256: 5b8aba71c3bc94b5dfcd7dcaf6cf2be562d4e4da1e6f15d87cfe09cb97f7f89a