Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c47301b44a0195…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 23:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e2ffeb381dbce603fd96962bf956b6e1 SHA-1: a11c1fb4e40a466ee6df1acc3fba25a5f9afad0c SHA-256: 60c47301b44a01955b36a9b9d61241572c404d70119365690b201a79d02acd60
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains an embedded JavaScript stream and numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links to compromise users, likely through social engineering or by directing them to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=hairstyles+to+suit+oval+face+shape PDF link annotation
    • http://duancanhotot.com/upload/files/purexurejogerosibonoziz.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/nodufutexapa.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f807b38c3c---44296760652.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/16162739468.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/28348877247.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/60555463105.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/dalazolipixulivi.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/xipejogak.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/lajomogalerapelupavedu.pdfIn PDF document text
    • https://ntc-container.com/upload/files/wikalu.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xerafetiwofewinatow.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/20876249083.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/rupivativowake.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/dibigowowukuruvives.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/58257946364.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/kuranesedirojipa.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/d0t9adumh0698dasm3bc1c8f36/21881915230.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/6565272667.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/wagud.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/vijezesigi.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210917021750.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_off0000d2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 17880 bytes
SHA-256: cd3851d93c78654880e2cc92fe1e34d61f65382422a04208cc90094b0dd54420
font_02_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 10744 bytes
SHA-256: 2b7035b000522a09a76325bddca517372b695802a61e6b6d04556103325a6fcc

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