Malicious PDF — malware analysis report

Static analysis result for SHA-256 026ba9d6e22adad2…

MALICIOUS

PDF

85.9 KB Created: 2021-09-21 01:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f47cb49a810d72ebbb60e7e4fce7e61f SHA-1: 560f09d4d091f7c932c5fcbbac68f96b6ea79316 SHA-256: 026ba9d6e22adad2f6cb1bd25c57f7fe62e0c25b98fd2f2948ecd355b686fcbf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malicious redirection attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=torrent+free+movies+download+websites PDF link annotation
    • https://natatourism.com/userfiles/files/13629958064.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/misunoxarofabifada.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/tefud.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/28061239089.pdfIn PDF document text
    • http://exosushi.com/uploads/files/fejuwetiv.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/91654123032.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/62564296873.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/wepudaletaxaz.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/59e297c16ef54ff98566bac94a22e962/gomazasidi.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/favipusunatelafakok.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/lojujaxuxoke.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/89847319528.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/78205942514.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210902043652271.pdfIn PDF document text
    • http://kes.org/upload/editor/files/galug.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/fuzejubegujof.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/jufame.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/nefavip.pdfIn PDF document text
    • http://marketingnews.fr/images/file/56144735080.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135a383502f5---16985969116.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/wigaw.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/54504686238.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/mejuzugonipasewenubozazox.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/46230144619.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/42187675060.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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 10772 bytes
SHA-256: 483347ac4eceb2f4cfcc4e3c7faf207f9509d535e5ffd4fbc555727565921b87
font_02_sfnt_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 17412 bytes
SHA-256: 035ef60ab5b3934bc5348e562010b608163ba5aefc8130306a7f6bf0c6a7dbce