Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46f49e698176f6d…

MALICIOUS

PDF

76.7 KB Created: 2021-10-02 18:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6192592d1ce1f89ae536dff1f1209ed5 SHA-1: d076ce4ecf6543f10b869abbc9f866f4d7771cf2 SHA-256: b46f49e698176f6d5ed69a64e03b03a7639844f3812682ba3d27985a73cce6fb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2e93b443baade679ad232e5410fb5118/17807214800.pdf In PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/71439114128.pdfIn PDF document text
    • http://quangcaovuanh.com/vietkiendo/upload/file/favaweramefevomi.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/92594574247.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/1651465423.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/07171314367.pdfIn PDF document text
    • http://parfumland.sk/upl/jozuw.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/95982357064.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/pakojulajilegedabuvaf.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/lokivetiwozidewedumut.pdfIn PDF document text
    • http://stroi-sistema.ru/img/gujevufubitumimijum.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613eceeda6ab6---koxanigejowonadorifuwe.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/lemiwisuk.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/67639148015.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/lumin.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/mevadunij.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/13294861856.pdfIn PDF document text
    • https://orrizon.ru/images/file/58510862601.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/jawigi.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/62103269624.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/94175669077.pdfIn PDF document text
    • https://ambalatender.com/upload/files/texaniwesujakusapapuximiw.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/lediwuxisebemef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ms+excel+mcqs+with+answersPDF 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_off0000c1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BA 19732 bytes
SHA-256: 1a895ac5658125702829c27deef11334bccb486d1ccbb11ea265fac2d4b90009
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB2 10700 bytes
SHA-256: 80724f7394e31390ef35589c403be4f488709ebc807979be9a3c9fb84f8428c0

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