Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce7eb10a794c0d6…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 13:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5a0801d5f9aba68344c4d08ee1566c72 SHA-1: 49caf95177c018592f8a6870378f32e4137a720d SHA-256: 2ce7eb10a794c0d6ef26f51047766e793ec9e436547ce4d93750287e5fd44d9a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, indicating a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ketchas.ru/uplcv?utm_term=combat+strength+training+pdf+reddit PDF link annotation
    • http://domadoma.cz/userfiles/file/12876694346.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/bizutusisideti.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/vomiradabo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/d346q82ohme8klu7880gfc4qr4/59138774332.pdfIn PDF document text
    • https://phm.vn/upload/files/31338137671.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/613715d0706ca.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/tunolasowanogugobupowezu.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/63582461459.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///pepebuxilosos.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/folegubol.pdfIn PDF document text
    • https://ratosatu.com/contents/files/83912232676.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/tonili.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/20603291438.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/7134768033.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/dixeberevel.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/47378435629.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/43634588770.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/6872894390.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/46788113978.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136249e4f13c---gevetiwetumeb.pdfIn PDF document text
    • http://yongqingtech.com/d/files/tufefigiwugaba.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109010956546823.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/93145305344.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_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 11072 bytes
SHA-256: 78f3530bcc8a844ee01d6895a39ba6223aaafaa6e1a4e1b265ec1242f3e66534
font_01_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 16268 bytes
SHA-256: 8a9bfa73a9d110099a6783d123f12a0eb7ab4f235d0bcb3e5ed44ca2b3807971
font_02_sfnt_off000122bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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