Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4a98173a6f4d3a…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 12:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bfed49b679bef7b8f7606abe7bc3fcad SHA-1: eeb47d1036b02803fa440c9150cbefd4e127890c SHA-256: 9d4a98173a6f4d3a57ed689a081cce486172aefc11d71ac127303466678091b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing campaign designed to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a deliberate effort to create a large number of links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=gangstar+vegas+missions+list PDF link annotation
    • http://narzedziascierne.eu/Upload/file/juravexurojunetipurikas.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/84388387984.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/6208277273.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/kosevumijoruvoge.pdfIn PDF document text
    • http://cl-pub.com/files/files/45936966047.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/mosokatebajurabavoxokidi.pdfIn PDF document text
    • https://maftplayer.net/calisma2/files/uploads/56626204283.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/wixijenerewasuxup.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/74470087292.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/fonolitutalenexolo.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/83545861970.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/57132958876.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/6362272665.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/73263075489.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161388eb25aef8---63912821276.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/xexib.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/xenumo.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/34343543928.pdfIn PDF document text
    • http://newkontakt.ru/userfiles/images/file/52694966870.pdfIn PDF document text
    • http://foodchemsino.com/d/files/44777813016.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/norimiritizuzirig.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/53f4ef1c0003bf0b5a05aae5d6b9302d/60371014394.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/28804316397.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_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 10556 bytes
SHA-256: b074032de901f584320384d9d8c1816c28c4c35628e2fa884a6d4e232a7214f6
font_02_sfnt_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 19380 bytes
SHA-256: 331000ee1d720f9a4ffc5c49bfcf4d54fddd9a489256b793c5d9d016db811d97

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