Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07fe8455c229f7b…

MALICIOUS

PDF

73.9 KB Created: 2021-09-19 22:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29fe9615e0a05897dc3ac36549f7b2e2 SHA-1: cd35468bc8502efa954ec0b2058d77ed72853cf4 SHA-256: f07fe8455c229f7b309e11d45aa741ed30b87aa7587888322d8b5e9657260f29
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 by ClamAV as a phishing trojan. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lead users to potentially harmful external sites.

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://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2c68ca32b---21797811356.pdf In PDF document text
    • http://synerfreight.com/syner_upload/images/files/35957458069.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/numovo.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/93228097193.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/46927713147.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/fodiboz.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/wuvevibapekunotimetogu.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/roxasolijewozu.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/silovi.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/74282105755.pdfIn PDF document text
    • http://ausafe.net/images/art/files/konekudikigorato.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/giforepumaliwoxusevalomu.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/0366c207d587d908946ec6f1d1403682/90814235193.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/zazeza.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/zojogaje.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090613502273499.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/90657247010.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/46032112286.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/60850887574.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/21614860641.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/rodivijanavo.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/jonotawuxiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kodi+android+9PDF 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_off0000be5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5B 17748 bytes
SHA-256: 70bee6ffb01d593f9a2cf9e72c9ffe993dea36aa09c1b1a6e66e01ed3c312ca6
font_01_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 9956 bytes
SHA-256: d63c755c44cc5ea9bbbdf180412751cda1cd10829b724ba3f08e337d437cfe2b

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