Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa74450fa7466ac…

MALICIOUS

PDF

75.4 KB Created: 2021-09-14 16:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: de47704c89d60720aa28d1780cd5e52c SHA-1: a3598b3cbcc63fded0c5aafffa464a4128cd772f SHA-256: baa74450fa7466ac846ff7a0b25b399557b948abaaaf4a1b45cb75749a5cc00a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://ketchas.ru/uplcv?utm_term=http+canon+ijsetup PDF link annotation
    • http://carmakers.cz/userfiles/files/9842929088.pdfIn PDF document text
    • http://saimiri.name/upload/file/46477080930.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a21b20011f---82297004708.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/35315987990.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/4758364776.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/wojomilomebejawikomo.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/79969893820.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/zekomafegijomusajuriga.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/nabegoliso.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/zabixudeg.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/645818882.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/tojuxibitafenosaninesi.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/fukuxaxotimet.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/91701708217.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/95591818071.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/1cae3ed307e5353c95d62878ce8e5295/witedebumen.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/ranik.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/7983382512.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/banatisumufagozekobafufo.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/redudoguvozaxorijejag.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/99228400116.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/91567081948.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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 18848 bytes
SHA-256: 7204db4f22d23d1261fd0ea5156fd67625015356d9da71f797277a8f3818923f
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10872 10444 bytes
SHA-256: 7f470196f70dbecdb72f27942a38e1b56a22adf20dd59a3f05d6f1feb9f2e88f

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