Malicious PDF — malware analysis report

Static analysis result for SHA-256 66016a56e88fa3bb…

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 10:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06de8a6cc31e3eb1e2fe4419fc23c071 SHA-1: c597d4515971ae42a5a1cccc3aa07f99927f39ee SHA-256: 66016a56e88fa3bb5b2c5bd1e04e1a959c0c4ecf131871c12ba819034f0cf482
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to be a link farm, potentially for SEO poisoning or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crewmak.ru/uplcv?utm_term=rdxhd+online+hollywood+movie PDF link annotation
    • https://gameclub.by/uploads/files/67933065686.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/misomin.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613be47e1eb1d---jepowidudokigi.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161330d349db5e---gitomofumes.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/84855713061.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/mefokeb.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/09/file/20210909_153333_141.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/91131723373.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/fb2fe957086ab489e20fd33048feeac2/femukiguxaz.pdfIn PDF document text
    • https://ayurmitra.com/files/file/dujunujobas.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1f7f13071---wugadimup.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109131151562593.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/funizefenoz.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/donaxemituporabetajabinet.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/6871540784.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/sidevawekadafadajopoxibuf.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/88973499061.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/48304483810.pdfIn PDF document text
    • http://spbi.cz/res/file/bumejafarikuberobofegisi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9k0ouo3plu068g4vh0nf6h5loe/19084644655.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/7974121358.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16133a7d7413a1---nivofopuwaxagokidilini.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_06_20_46_23_4450.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_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 18348 bytes
SHA-256: dbddbfb81e382f54c130ad93efc8406237276ab4d47cd8b51089ed4a47491efc
font_01_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 10396 bytes
SHA-256: 5b28ac96730d0945ba805899faa6c778349f402558f65981fd67f351fcf72172
font_02_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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