Malicious PDF — malware analysis report

Static analysis result for SHA-256 6009a0f8d62cf164…

MALICIOUS

PDF

81.4 KB Created: 2021-10-05 08:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 20e0229117529c52a360191baab7d898 SHA-1: 145d64b6c87e9f5aa191931f3aa5b45c03b463ea SHA-256: 6009a0f8d62cf164106091a1ba9210504a774a1ba4dbe41bbae13ed6ba36ccd2
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 part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to one of the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pistant.ru/uplcv?utm_term=ariana+grande+cell+phone+number PDF link annotation
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/38783706558.pdfIn PDF document text
    • http://boki.hu/editor_up/mesegafovorit.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/53453195760.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/32536982374.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/96072671220.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/mukotabotobevabasurada.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/93957090743.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/60012964520.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///motixuduxinolulepamekukom.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/35942572838.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/8913530587.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/tovokogerilikusaleme.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/65010875739.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/70394606972.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/mimojikujalag.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/71736947556.pdfIn PDF document text
    • https://businesslife.com/content/file/kalatomedoxas.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/14551301837.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/32999900079.pdfIn PDF document text
    • http://thevalleytrader.com/files/9526643853.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090506153573499.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/kedizetopizaz.pdfIn PDF document text
    • http://wdnederland.nl/file/26070096848.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3b532f5844b1bc6737638450a0ca03b9/laxefoz.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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 18676 bytes
SHA-256: 774de7bccb9f7e0fa6a6c8d5c3d49135d0c98ed45a5a4076bf7d2c2ae45ad8b5
font_02_sfnt_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 10916 bytes
SHA-256: ccb5b252489919afc0f98330e8ca1a347bef128d7c23bb09e47acc694bdd0799

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