Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b29094f9b0f233d…

MALICIOUS

PDF

71.6 KB Created: 2021-10-04 11:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ab0400c3f1bed29c9a98c337a38d7f8 SHA-1: 3b9d629075b6b26dac7fee9db4e3fc55a15ac310 SHA-256: 6b29094f9b0f233dea36d57d06283bbe3aa17aedca2028a6b1b876d382e32e28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a redirection mechanism to malicious sites. The PDF structure and embedded content are consistent with attempts to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=class+9+bengali+question+answer+2020 PDF link annotation
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/notenorimikefege.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/keginudem.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/43193754489.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/58694560338.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/funog.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/monibuvuvexufepalujejeg.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/18027652684.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/48897199618.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/94001257974.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/15005528539.pdfIn PDF document text
    • http://byecook.com/ckupload/files/30366731481.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/mevufonaxuzopinunowegup.pdfIn PDF document text
    • https://brs.jo/userfiles/files/zofiwufo.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/sixigamilatimiponi.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/3397846974.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/rukawifirewozez.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/81288058215.pdfIn PDF document text
    • https://tsolisp.com/files/file/kejalolapuvakelukekoma.pdfIn PDF document text
    • http://gnox.vn/upload/files/13752477921.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/bajivajebupome.pdfIn PDF document text
    • http://edituj.cz/res/file/fadukefeloxexevav.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/neburezol.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/paxivuxakedaj.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145aad3013f8---61840920227.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/10183731395.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_off0000b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF3 16260 bytes
SHA-256: 1b6f4e422db4f6e125316da151d05afd383a2567e083fcda9729674ff8bfffd7
font_02_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 11196 bytes
SHA-256: bbe90e4bf03d27941921f3d33dcb0a01d4387a7e74a8839094cf902e27de3a03

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