Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93e0010fceb0035…

MALICIOUS

PDF

80.2 KB Created: 2021-09-19 02:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 45902ca3e7154c193052b5298bc59ba2 SHA-1: d55a637444fcb3cb3c536522e276afa5ed2c08c2 SHA-256: d93e0010fceb0035f71f17e31ff3100f658c277510a4f2f573cbb35f5e8ed652
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oniceh.ru/uplcv?utm_term=hack+for+roblox+free+robux PDF link annotation
    • http://kolaykanal.com/userfiles/files/37557976903.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/46893482100.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161392b46b5ddb---vemonuwomu.pdfIn PDF document text
    • http://receptlap.hu/files/wipedabize.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/76198038080.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/76678854282.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/kusaxowivepebasi.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/daviranomo.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/20260433648.pdfIn PDF document text
    • https://bnovum.hu/downloads/nuvufigatokunerabixef.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/dipezoguviligedezapife.pdfIn PDF document text
    • https://chv.vn/userfiles/file/tewanubikipedumakikowovo.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/64421842084.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/wirezulugozotadopir.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/51266023922.pdfIn PDF document text
    • http://aprt1day.ru/file/zisibuwibabiruxufuzu.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/25915047130.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/sodupubigapexobixite.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/38519508219.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614665afa7124---xijagakuvidepuvasojej.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/32097048624.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/pezitozavuforu.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/tifefajelajufulavava.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_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 10292 bytes
SHA-256: 22df509cf9aab569643c410b9580a4d754cb97922ed1deb1ede526296294028f
font_01_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 16976 bytes
SHA-256: 03d0e6ff32a747cc4a58422239215bfa8aaf2877cf23d4cc269562addcc13074

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