Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eadcbbb58162d70…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 15:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 570a3b0aca7c6a7ab45e02291783b243 SHA-1: 5f82e6f6128f54819ca8bed8f35e3f6f82f0d3f0 SHA-256: 5eadcbbb58162d70600ddc5a3f5d89b83cfa92a269765280f88f98fb5bce8137
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to manipulate search engine results or redirect users to malicious content.

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 http://wedding-box100.com/uploads/files/202109010552238683.pdf In PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/10319507834.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/wadusipagi.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/dexinomebonituzazekozitej.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/92248778975.pdfIn PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/20300104231.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/48103709189.pdfIn PDF document text
    • http://sapthagireesyathra.com/userfiles/file/julusilojuxefixot.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16130b6b7981b5---lilalet.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/53547480291.pdfIn PDF document text
    • http://orderkai.com/uploads/files/rutapunumulawexol.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/volizokemod.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/39947781374.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/67831177079.pdfIn PDF document text
    • https://udruga-invalida.hr/files/24571264304.pdfIn PDF document text
    • http://ore-processing.ru/d/files/gesafizalit.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/47000734962.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b2713d12a2ad30820aa85673359be776/97241017277.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/32318892743.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/lerizolalitapisitoriv.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/gunivadozaza.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/24607602749.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/50215216734.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/soxuvabokapuz.pdfIn PDF document text
    • https://andana.us/files/files/xebalolovunineku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=jurnal+internasional+akuntansi+sektor+publik+pdfPDF 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_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 17192 bytes
SHA-256: c77deb5746a20c22bb4eb9d15d9808acc4642d5198ed5f54a8bd21893ce72001
font_01_sfnt_off000112b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACA 10816 bytes
SHA-256: e5d68ae34e9584d560341baab8b537637e02dfef1d9ff509579482a5eed35f76