Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19dc62a42afa9cd…

MALICIOUS

PDF

77.6 KB Created: 2021-08-09 07:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dfcf315609b8e3275a7f5c87154fb191 SHA-1: 4bb5f8fb03d9a3628d80d585eb51496f4b98197a SHA-256: c19dc62a42afa9cd62edbbd2d619b0ecdecc5f72b8dc60318c57bb72d98a0407
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and other domains, suggesting it's designed to redirect users to malicious content. The presence of embedded JavaScript points to potential exploitation of PDF vulnerabilities or malicious script execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://bawwabatrizq.com/userfiles/file/73384445959.pdf In PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cca7d85e77f---34233664299.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7115bbad88---53566055101.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/15652891396.pdfIn PDF document text
    • https://dcimx.com/files/wajemotinuteton.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a48191471c---gabazap.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/jupupave.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///tulifawawuwavogapapa.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210710032752.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/83987842682.pdfIn PDF document text
    • https://rinducm1.com/contents//files/75704760447.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607293c197db8---31092943828.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be38c4bc4dc---pafevixasidosazaj.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/dipupenategewogigefemow.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/sejubebuxenabatetaxuzaxu.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/losumowupiruzeposowe.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/60940542871.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/gogeraje.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a389e6bc0c1---desukututemapowamowo.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/fezojeripe.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16107d33fe9bea---tixuvare.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/kuxesodobedal.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078161973707---21038858389.pdfIn PDF document text
    • http://billsky.ee/files/file/29551811623.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b346991ca2e---92492686010.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=s%C4%B1rp+filmi+t%C3%BCrk%C3%A7e+dublaj+tek+par%C3%A7aPDF 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_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 11240 bytes
SHA-256: f5a671c35948ef3e27950f42d43e5fe44587a1ac8299174059e7e43c7a056e12
font_02_sfnt_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 17916 bytes
SHA-256: 433be62ea09d2a10f09d6dccc4df74330d3bcd7a781195c3686b35c7e4ed8d99

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