Malicious PDF — malware analysis report

Static analysis result for SHA-256 5936e4b45c93df83…

MALICIOUS

PDF

114.0 KB Created: 2021-06-30 00:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 88bf6f82f1b8714d0d1d2477ceb9839c SHA-1: b70e412c4c228711fe812809ec1d22c51cb84b4a SHA-256: 5936e4b45c93df83d68e8691532ad94080c004c431a9d71246d9411599d7458c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting domains, 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 delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://landbondcorten.com/attachment/file/ee442ec5e733d3c1c42e1b94a6b13f5b.pdf In PDF document text
    • http://engineersclasses4competition.com/files/others/lojagozonegoxexixab.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/2rnis6s217k3u72hejkbk2k1fa/nuxetupowarenebitiwadib.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vh970vlvbfgsa3cei4kieqhtec/vuxikokakidabujubifuvojev.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/97197697706.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15e5a49e4---25757515173.pdfIn PDF document text
    • https://onlinendttraining.net/files/49484942674.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/a26db86f32c3b277a4690e805fda9d46/59462107800.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/kowiberisokib.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d00b07b8a---69377710367.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/80963022470.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/72007209215.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6468b47bacdf530079d0fd29c01f8f0c/22918189082.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/nosen.pdfIn PDF document text
    • https://digireg.cz/upload/varoz.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/trfl45rv11d1oep3hmt8g8lvh9/23502639852.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f5050eba3---18184178378.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c48cf3b71ca---xareneweveponuj.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/r8torh6sndb293kofsbvs2omm0/xosogivemilopuxukirulebuz.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8328a2e46---10620522055.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aab17a093---4204555829.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/06/202106261507376129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=exodus+old+and+newPDF link annotation
    • 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_off00013d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8C 17540 bytes
SHA-256: 1fbca00590232a7e45aa531e87520c944cb8545cb9b4602b0aa37dc73bd314ef
font_01_sfnt_off00015840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15840 20360 bytes
SHA-256: dd6a6982188c02393e6326345ce434c51a5ab0268aa47eb27f8a6cc863917aa4
font_02_sfnt_off00018b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001a38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A38E 10220 bytes
SHA-256: 1a07d786c93e2af07b4bd7a2939044461351620d7bcba6d927475d7af008ef69

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