Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e46a4156533db81…

MALICIOUS

PDF

79.0 KB Created: 2021-06-25 23:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d34ee2c43e8bceb240260eddb5524eae SHA-1: 0917d7f3a9f05070c235b2703f014ae111647c08 SHA-256: 1e46a4156533db817439f94ad6bc89a38d60c30406eaf181fc9a519f16063d1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://ketchas.ru/uplcv?utm_term=present+simple+exercise PDF link annotation
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6bb1e5c2---28420522963.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/63fb925a5b720b517aa9a05a37ee5941/36861020680.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/2d97ba81524fa93e61691d225977752d/78572392237.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc1151009---pexebobuweki.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/lodelejojiwi.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/52543205125.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210601182842115873575.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/94624005397.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160824d7cc8ab3---zaxufafepuxosiwitito.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6c7ded804ecc1b7fa0772c839d545bdb/47213630225.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caff58abfe---tajag.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/xopezoteserabububo.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/lamofo.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/b15161a87d3b3634d391b6bcbb86b9a0/dizibokotivimat.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/dajofokuwoguneroda.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/jisanokirunaleremugefa.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/16ak495d783ab9ta9mdiol29u0/xekirosixelofo.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e68bd1062---57730122585.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/h9iefloilkgopuhsm43jh40nv3/177521862.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/10764878494.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/81767289128.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/pipilen.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19f420a30b---kivimikuwoduxoguzu.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_off0000d2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D5 10356 bytes
SHA-256: 7543b8d9d4daa7eac984f21e8a77d423a1a09953197dd39c5fbc5b34b00a5a50
font_01_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 16588 bytes
SHA-256: 2413e1281a7c43a1d4e7397f2af032df0732ec90d92330bc3aaf86416b5cb26a
font_02_sfnt_off00011549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11549 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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