Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0fb4104c0053b6…

MALICIOUS

PDF

83.7 KB Created: 2021-09-21 19:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bb37484182b683ef92b00af206251e74 SHA-1: d0b52910f26c7a7ad94b1d3b23ce7ef111456a8c SHA-256: ee0fb4104c0053b6f5387107cde99d1c73cf321f24bb3d88084e6546bd499ca9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm hosted on disposable domains, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The embedded JavaScript likely facilitates redirection to malicious sites or execution of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=watch+the+bachelor+season+25+online PDF link annotation
    • https://lmbri.com/WYSIWYGImage/file/50629193602.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/66399176717.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/tamelodijawodaxabavifi.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/6155604763.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/38828893607.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff102299fe4c3fe569c40f6ebfd38a1d/wojowaleridux.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///lupimipijojujilatesuz.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/xixiwafexevasakuseref.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/folidizujonulaje.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/lawago.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/lerem.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/081819093997.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/44764004067.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/92234966488.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/piputofuzupe.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/wajimugekinokajitejikala.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/65834170206.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/josuzomibegusajaxa.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/bewupevanimalipudefebago.pdfIn PDF document text
    • http://risme.vn/files/makogufefenefusisobolo.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/palewonupufumatigelu.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/rikafujexidifusuf.pdfIn PDF document text
    • http://gioithieu.btccorp.vn/uploads/files/lelatonamofezagox.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/67096076193.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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 10712 bytes
SHA-256: 71daea3ecb7e754daddd2a354913813abf2e5bb70793930d41dc6ae840b3ed8a
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 18476 bytes
SHA-256: cd1299700dded1c81a674be7062d6d239676d82e05da17d97dd04dea7bd341bb

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