Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2089b78632b1e32…

MALICIOUS

PDF

74.3 KB Created: 2021-08-29 20:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 73d1529a3b9b729e4a35ba8467b8c7bb SHA-1: f77701365662a22c66ed58551f73252236cdf151 SHA-256: e2089b78632b1e32eee66e5a55199fa0c685807a02a7c0e7d72e06b195948d70
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or redirection attempt. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f621ac55e5b---tabuverivojol.pdf In PDF document text
    • http://maidichike.com/upload/files/96498606121.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/28416cf2bffaf8a6f1cbe74bb890168d/39016484045.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/78758800603.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/zotusikadawobapijamoto.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/15624025374.pdfIn PDF document text
    • http://beateromer.com/bilder/file/70944194351.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/nexilajowidubaxuzotoga.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3ca144b17---julobimuninedu.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/psosndsji4up9kggpjfsgveaj4/josarir.pdfIn PDF document text
    • http://ridendo.cz/files/file/52504122815.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16077124d469c3---97435046460.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081b714251d4---xunorotowiforubusu.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f21da858d5---wapado.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c282670d7---goxug.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/63564650952.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d9349edebfb426dc7bd3cd575c1a0037/nonin.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/346025882.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610ffd4955c61---57250074648.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ogodudetebonaxaxi.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e257f3e9a9edefb1f9e9a59b77860e96/dixina.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a5d82920---zofadokubigolikarufugus.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/78996111550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+create+pdf+link+onlinePDF 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_off0000c0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 16336 bytes
SHA-256: 7f620478a2a5bdb31d5e683799cbcc62fcd94f390c04eac0d996e6eafef9bff8
font_02_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 10612 bytes
SHA-256: 2569245b9182ff3b29e02fe13bbd976157afa81238c0d2e9cf39d926a4102d43

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