Malicious PDF — malware analysis report

Static analysis result for SHA-256 a714222445b6c56b…

MALICIOUS

PDF

88.5 KB Created: 2021-08-17 18:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8b822e1e29c77a54497bc74de7e4139a SHA-1: 9e5188e90b116ea160887c7707a728ae33fd7b6f SHA-256: a714222445b6c56b33c96282315e8f2dc882bd8bfa3b0d56015869471e949fee
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to malicious content or phishing sites, leveraging the 'utm_term' parameter in some URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=nor+nork+lehenaldia+ariketak+pdf PDF link annotation
    • https://paklya.su/design/img/upload/file/90981518843.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/27260091290.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/vejeditox.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1ad6b53d374d2c4b0d2e537dea570535/30903575219.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/tedigusonowopawolojobevu.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/gibogoro.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/mimovozawilaw.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc426a453f---33075377894.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/lozepag.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160869dc27a498---fogagobamaxaninupisonaliz.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/sixufagenujoduwaxawaw.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/49122307483.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/34153240699.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/7412480512.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/65582138949.pdfIn PDF document text
    • http://sterkrade.net/ckfinder/userfiles/files/40310018877.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/miwenoparivido.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/takisukogijuravosapadese.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/loxekitijadipudukujiroze.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/uuagbuqefs9jg3qm53puhlrco8/2505046310.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/uolndn3b71iq24q2hgmar7bpt4/gotodomer.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_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 23020 bytes
SHA-256: 8137281f7b4e36346da95c5a6c80fa1997c4347b2b800cf5557810ab2f1bf729
font_01_sfnt_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 10496 bytes
SHA-256: 7a97821a78e0d8669043d24d31b55d847e4f368d8d2ad9ce9472df60e0ad89bd
font_02_sfnt_off000139f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.