Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7d0a2163c5e9fb…

MALICIOUS

PDF

85.3 KB Created: 2021-09-22 22:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 807cf086b7881c5d1dd2c8c67b19e02a SHA-1: db6070e6f223bf6cc86dc19f87d750ba19befbde SHA-256: 8e7d0a2163c5e9fbbaef588412277c82aac1e1d1b5fd4073583e122b6f76630d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and embedded links are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=how+to+sync+outlook+email+with+android PDF link annotation
    • https://ajitcoatings.com/uploads/45010280182.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/44602693667.pdfIn PDF document text
    • http://crediramasrl.it/public/file/negudula.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/rexevapot.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb3c0b69c1---58922844955.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/44114414026.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/xasopezesukazujatiwaxul.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/49503872403.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/zunozaxetosobap.pdfIn PDF document text
    • http://maulich.vn/attachment/files/gigepipeluvoxezudopan.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/watuduvumotobene.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/xuluxa.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/xewokufizudev.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/bonuwaxixaranetogo.pdfIn PDF document text
    • https://healthresearchinstitute.net/userfiles/file/gogosofi.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/revasowanofuwakivujo.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/79149450298.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/43696403618.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210910111119515299.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/fipomidomijufa.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/tunidokefipanosotuzebu.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/gavijataxapa.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/9091483291.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/ganabopokidudonika.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16142d5bfa540c---wizowifomujolokenasub.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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 11020 bytes
SHA-256: 46e44fcecfff0d336157176cd8716421987b6d08d795a082aaf136ca240c1219
font_01_sfnt_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 17528 bytes
SHA-256: 7b8fa1cdc961e5450a6d8cf1293fa9e46c551cc2cac5791135c4e0f4dd6222fa
font_02_sfnt_off00012f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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