Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7929c36883c923c…

MALICIOUS

PDF

73.4 KB Created: 2021-09-23 23:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9110780be6855cd18b93cd768ee50583 SHA-1: 2db159a3f50f1b76f72ccc133104e7746ee2aaa3 SHA-256: f7929c36883c923c1dd4be8b84d16630f42eb63b4f525dea9162b0ce0b0beb5f
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised or disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic suggests the primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://coretry.ru/uplcv?utm_term=ps+vita+android PDF link annotation
    • https://turdv.ru/SITE/files/editor/file/remogupusasagev.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614540d37527e---47897953172.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/vaxupizuso.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/mikubatava.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/bubop.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/guzigafutuzagegekotilapo.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/83718180272.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/93ad4637e6e3d166c320d4d2baed0fa5/39763870283.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/48115669166.pdfIn PDF document text
    • https://geniodelweb.com/file/fotaruwodidedi.pdfIn PDF document text
    • http://crm333.com/documentos/file/13328133687.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/90770667950.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/sevemonagomofises.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/24645018755.pdfIn PDF document text
    • https://arendic.cl/files/57963104300.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136b782150fb---94152194991.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/dekuvutepataxopexeperede.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/48109989478.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/virajavirimolabeg.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/323b2588c2466bae657ff800c343b7b0/botomutiwixiwifotagore.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/gepejakoba.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/91175965399.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/45045242444.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_off0000bedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDD 10132 bytes
SHA-256: 6aac35788dcead94a374dea9809c35f6d5f6887a84578820d7f41d63141e4040
font_01_sfnt_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 16472 bytes
SHA-256: a2ed5830469943ad6520a2123c2b4e5df7cdd7e329fee263eabf331de4b620ce
font_02_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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