Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23fd7ec0dac3fbf…

MALICIOUS

PDF

77.9 KB Created: 2021-09-11 03:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 90e814b5bc15faf82c2a191ae54dba12 SHA-1: 40021513a17a87b42020cf9765e2bcabf0761bc6 SHA-256: e23fd7ec0dac3fbf90593c5cecd9c5121ce131fad2d4f3830451d7ce1c2e151d
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 ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://nomylo.ru/uplcv?utm_term=android+keyboard+slow PDF link annotation
    • http://oilmachineydy.com/d/files/genodefu.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d806dfc27---tefejizoniraresaborix.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/53021524982.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/tojumagivutaponikepevuz.pdfIn PDF document text
    • https://superpart.com/files/tiboxafebuvit.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/51716792708.pdfIn PDF document text
    • https://tl-systems.hu/files/files/gelafarilexukukaze.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/15658717976.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/85726915226.pdfIn PDF document text
    • http://naso10.com/userData/board/file/pedegopilaxupidifosigalif.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/97955316276.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/77476183081.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/71618593002.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/71452579450.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/45460427048.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/kamavuvese.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/86539986357.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/a6b871011be23056a957848389da340b/nanijedemovidatu.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/wabalukifafijagiponuzufi.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/31152891390.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/zerigazefojamaluvul.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_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 17168 bytes
SHA-256: 4a191d05cd424904659fc8ad89532c67e2f54da1354c192cc6281bf0e38634f9
font_01_sfnt_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 10556 bytes
SHA-256: 7da28f215ab277715a80bfc355f977da72a84c706f97eb47d065f8603db2fbdd
font_02_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.