Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7defdb6b91d28f…

MALICIOUS

PDF

70.9 KB Created: 2021-09-27 19:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7eeaf8c2a1cad548c4d1df1297da65e0 SHA-1: f18039b14e8d7ffe28e6809b752027a04eb59358 SHA-256: 0d7defdb6b91d28f287b041bc016bf7253c082cd048799510798c63d69e2117d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a link farm on disposable hosting further supports this. No document body text was available for analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca7e6cc8fc---dorikujila.pdf In PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/64360299445.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/23600077782.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/ruvafetobijukopag.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/16973225572.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/12707334123.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613410465f5d9---gudusosomilo.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/deduv.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/83419471897.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/44896366599.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109051134326993.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/zukoxeropugot.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/kezaxurudebowupuj.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/nolerozafizulula.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161340e1d85e72---81647674686.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/41917125296.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/jusuzalag.pdfIn PDF document text
    • https://tkbhanna.com/ckfinder/userfiles/files/wixigamafido.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/vowete.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615080516874b---75982061674.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161363d58f3200---33151283414.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/xadukofovemomotezuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sniper+3d+hack+apk+mod+download+unlimited+coins+and+diamondsPDF link annotation
    • 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_off0000b1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F4 15472 bytes
SHA-256: 75bbe8ab482181562e0180402a4b877708cef79ba33affb8d96fb10db9442185
font_01_sfnt_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 11304 bytes
SHA-256: 34d8a02d2284137c6b78bd87f8aab3988fc3b5fd8da5c503bb5bc9dc68d75f09
font_02_sfnt_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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