Malicious PDF — malware analysis report

Static analysis result for SHA-256 29622ed18d6598a8…

MALICIOUS

PDF

76.5 KB Created: 2021-10-03 11:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bdd8fabe91b417b114bfba4390ef3dd7 SHA-1: 4aa76c086503ec83e51bb4a966964a91a82d8c45 SHA-256: 29622ed18d6598a83b11f3f2ce252d8c13a10498f5a997ca9154a4e03b7c68d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ocvitlucky.com/vietkiendo/upload/file/82912142161.pdf In PDF document text
    • https://novitas.ro/files/fewilisanedobu.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/52400342054.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/36558696300.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/kikevimoxulilepazanume.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/11542064930.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/56504911150.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/vovanakisumo.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/jetixuxepotapavotida.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/dowuvotoruwevep.pdfIn PDF document text
    • https://spyboarcams.com/files/96738037709.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/64627680549.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/iprpava0ausdpra3bd73tqmgrk/mevaxezituwikepepufew.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/14549119410.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/46774657688.pdfIn PDF document text
    • https://bczenekar.uleshuzataruhaz.hu/files/file/duxivetisiwozegolu.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/6070578810.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/gosakopetatixawesil.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/pabozezuzum.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/besewotagodavebunore.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45062887832.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/13311000167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=modern+operating+systems+by+andrew+s+tanenbaum+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_off0000bb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 21496 bytes
SHA-256: 4eff52b3a6e34f2503010eed2f1f25e7180104d6a46e09e6c3bec94f699d53ea
font_02_sfnt_off000109d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 11228 bytes
SHA-256: fb87c07c10537d50cc29ff1920f81edd6fdf75df37f7c85e4a145beac68ef14f

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