Malicious PDF — malware analysis report

Static analysis result for SHA-256 9091ccd7c84640ab…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 03:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e77a5d4d42c87380fd1fa5e8977272e9 SHA-1: 11d4f3361b78d6f7a8b9e4c1c8813ebb49d75ccd SHA-256: 9091ccd7c84640ab53136c16b146888c6e080ff185ffedb3699cd903c9eaabe2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. 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 goal seems to be redirecting users through these links, potentially to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ecovn.vn/uploads/news_file/jiwovomitosevusibaruzunax.pdf In PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164617a92d---mesazogepapemof.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/94071589200.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fojegaziroderusu.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/67304260147.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/55268000500.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/91866531384.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/76788171608.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/0324f25fc6f5f1b55cfb5fd673c22501/18165507548.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/tuvom.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/1938568828.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/50729512097.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/24594478493.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/91614754923.pdfIn PDF document text
    • http://myphamasia.net/upload/files/32768487702.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/gupavapujoxozefub.pdfIn PDF document text
    • http://dsagco.com/Upload/file/14243281069.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/jutowup.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/25889714616.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/nejozavezibofaki.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed8e25cb37---80233860820.pdfIn PDF document text
    • http://kesifveotesi.com/files/tezubetivagenapisagozuwi.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/tanixejiguvasap.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/wuniwodufetuker.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/37191226683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=chain+of+thought+androidPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 17996 bytes
SHA-256: d2d2d8ea002a313ce6531adef352891a984c3c34e046986592e66cb41f8aab62
font_02_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 10420 bytes
SHA-256: cee46b0343c7226fb3c27c4ef28cfa8a7bdf6b4738f50146a2c9d0ecded51d4f

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