Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ee60523efd00b1…

MALICIOUS

PDF

75.8 KB Created: 2021-09-04 02:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6dc485dafc4e13ffc9d73cf32c5f000 SHA-1: 9c8e49f2d94a7eccc58cda236a8e52292806228e SHA-256: d9ee60523efd00b187cc0ffb491985d4240119ebd7598ede8da57cb7e507cbc0
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting domains, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://kiuruvedenlukio.fi/tiedostot/file/81598612161.pdf In PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16108a394d1cbb---85643245859.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/dda1e34e5d9080bc622d500a4b6f7414/99959489031.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/takezix.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dbf3954e9---nitekosiw.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/tevavuxokupel.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/83200400828.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/serej.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/mifapezobokedapiweroxebej.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202108141125346912.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1319ee0836e26d492619f338e54778b7/bovagisowarebonumeb.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/wolokasigawalujutesezeson.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/nomipezujananewo.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/3el3132e5vaae9ckj7d40ghg9j/1531384923.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/3716daf1ecdb10771a112a52de97a3af/39377683278.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/fiqctpr3is5t5voukkpea1h754/94999440690.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/kukodekufiwa.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160792508b7cee---bodinasaviloruka.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/wanogikanuja.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/rewakud.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/52373583044.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078338c5d4d6---34710055580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=l%C3%BCzumsuz+bilgiler+ansiklopedisi+3+pdfPDF 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_off0000c023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 11456 bytes
SHA-256: c671449613938a3665f44e9098982c1e059049daee2f309dd7cc090fcce16fb7
font_02_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 18008 bytes
SHA-256: 8b3561bc7c1d911a669b991a6d13707d1589faf42121fbeb9246218351afddc7

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