Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce624d00ed9d22c2…

MALICIOUS

PDF

117.6 KB Created: 2021-08-15 11:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6c5afd1f4daa7a682c03a1f017110b67 SHA-1: 200b5a448099477fa53b9270b95caff9acc0b961 SHA-256: ce624d00ed9d22c2a63b787d45a6811f99a754ae2366a1efe27f6844e790263c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wastran.ru/uplcv?utm_term=revolucion+francesa+ensayo+pdf PDF link annotation
    • http://criollo-cocoa.com/userfiles/file/suwovodejamawexelu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d802a7ef5d3---95425577497.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mn4t49v5vhnomnevnfgsrj8cjq/rugixinuriwonow.pdfIn PDF document text
    • https://dm288.rs/slicice/file/30867370298.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160833328a261b---75359438474.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/263180c30fb99e52cdee5ac0e1594007/gerawojexovetowuveponij.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/342bf5d774fe2b7909add4069f3afe57/55942664066.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/182cca733465e5d6505f6a7c9d578f16/mupelob.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/60141642156.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160baa90d5ace9---19358778015.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/lafamaxuworakepiz.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021728111458.pdfIn PDF document text
    • http://king-ber.com/UploadFiles/file/20210708053201864.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/nibipaxifu.pdfIn PDF document text
    • http://lex.tj/img/file/7547242635.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd8483f613---21847378846.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16103473c20b91---30205826561.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe4e31c0dd1---lixojoguraleb.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608122996bc94---96049075598.pdfIn PDF document text
    • http://suncreekpuppies.com/clients/8/88/88daaab1104cc9784d9cd8b59d189b35/File/xemigudidoxipobanomafe.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/91997528216.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/56188232758.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nekuf.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_off0001662c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1662C 10840 bytes
SHA-256: 96d8fba2c49d51fd269118cd061ca8b14c1c863cc639274d4f46e4db908ea086
font_01_sfnt_off00017f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19763 18488 bytes
SHA-256: bf304b008923c1a45e7f376faf5798514db8c34ceba8da499a81228041ae02e9

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