Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce0515825766a0d…

MALICIOUS

PDF

169.2 KB Created: 2021-08-17 12:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c349a2703adb326cd4d33c60f79306a SHA-1: 8604efd4413099b831ea3eb30eaac5b6e0d60fb1 SHA-256: 6ce0515825766a0d2c444a8dc20970097d505457259d61842c124d5c50dd4b1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=que+foi+o+primeiro+campe%C3%A3o+mundial+de+clubes PDF link annotation
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f9241539d---72996830172.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1626121281182819059.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/acf4ca27ccc6045564ef743ecb8fc767/wufilojepakonovunipabaret.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a045cd530d53eb9e47d79d92341d3dc5/pagejubixelulujal.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab80fb41c53---gujebukumixo.pdfIn PDF document text
    • http://grupophi.es/uploads/files/wuforineju.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609769c7adebd---59139408827.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/65519752279.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kunipijab.pdfIn PDF document text
    • https://noventa.cz/media/files/file/sozajes.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/57067147134.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/sakema.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/74321629762.pdfIn PDF document text
    • http://policylic.com/uploads/files/41829963212.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/83a58bb2fe70d707196a620591d82f56/nalevujusojelukemasoxekuj.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/93065492146.pdfIn PDF document text
    • https://langumeistras.lt/i/File/12361359850.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ee1999617db029e4b863e2d63b9adfaf/85755949874.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/worivoketezijewarat.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/givilasupimuwedapenape.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/mafujetifam.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/xonavuratokujuwipizeza.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_off00022b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22B30 11248 bytes
SHA-256: 82c000b40450e4868caef765dd8116ab9c951e9b9e76272a8bad62e6faed2e1d
font_01_sfnt_off000244e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244E2 22408 bytes
SHA-256: d90e54abcd99beb575b631c2755ec2dd23e0a55d7f07c2bed267268663aa55c8
font_02_sfnt_off00027c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27C1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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