Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef3fc787d6c9495…

MALICIOUS

PDF

94.6 KB Created: 2021-09-01 10:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0b557970301de46cdde2d7fafeb46af8 SHA-1: 72db8c0131771bad13fdb1a794b091862387cf97 SHA-256: 0ef3fc787d6c9495bf967a5a2ffb49613da5c47cb259882d53e1ac48af28be7e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which appear to be compromised or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://perfecthospital.org/FCKeditor/file/41250417448.pdf In PDF document text
    • http://maybaobidinhdinh.com/upload/files/26047634103.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/39074510942.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/razebajisupukivizid.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3fusrb1t9g3dk18mkq4kj5aa71/kefesobakixitujeve.pdfIn PDF document text
    • http://indecomavo.pl/inc/lakomemisonarekijuvijamo.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/11411802966.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607412b0f335f---bafuk.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08faf741e1---tofapiwapinog.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6517ae08ac---91599011842.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/10949139203.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/fawoz.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4c3186efae666e8397b01a2c8605881e/21753168696.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/waduwegilojuruva.pdfIn PDF document text
    • https://naoshima-habitant.com/vedifo.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/99394554940.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/jaranalewatovabukaden.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/m2igkdkcf5hpuk0jgj03f01a4s/talopiwesunemi.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/16256781551.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3b87b767---98069171377.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/fegefuwerunuveg.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/feb05998b0fcaab74ac2d71f8a4d6c42/sokadesug.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/12832570033.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4de98dc746---84899481976.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/8409318351.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/pirejewanesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=blow+my+mind+away+meaningPDF 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_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 10480 bytes
SHA-256: 99328246b604385ad288f55524d613d1620166f4ed9c417689e4a625e227285b
font_02_sfnt_off00013ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEB 17820 bytes
SHA-256: 7b11eed5fd758850e647396def3db154d504946a65563cad4610396cee6719cd

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