Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2f2e5a8d901dee…

MALICIOUS

PDF

140.6 KB Created: 2021-07-03 11:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c3ece4b080590b37239e72444b26ca09 SHA-1: 7add8abf393cdaa3cf79403db316d53f761b2b5a SHA-256: 6f2f2e5a8d901deecb51446e55b3325a0be7fe638fce37afa50f51c0e360415e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8279

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://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd3c4d2606---61119647297.pdf In PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d93c1398745---jotifebiwajiwekufuguz.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d5d87d2be8450602b60b0c08fa83c3bd/diteronanaxizi.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/10584531885.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/kurepupolotaxuvafe.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ada3ab965---gewewalevofozorikalol.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608614060ff09---jaxawovirupuvameziwamokul.pdfIn PDF document text
    • http://indecomavo.pl/inc/koranitomusuxemevu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/zamifiwoneselalegakonun.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/018e700338a1e63f453bb5d9e4efb10f/fudakedigeganisor.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081d6f03fbd5---levuduwupezurotine.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49447c5a2---zusupukunifozisowiduvapa.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092650aac0bb---98334754710.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4126a68c1b---64939052825.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c4c69e195---lekenexegijorokafido.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a500b946f3b---76398850052.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/71734886df8310f4c2c640e5f27a766d/loraxiviwiso.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2833f844---4402948201.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3a1d2ccaa---xatupewegowozopugokip.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/9c43c9ec3101643f2264ceb5fa13e6ce/68800837627.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/235215e31bdc0fc3d1b29b2da4a4fa32/vilawevupiganino.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/53120961670.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823fe74394a---lagadosewevofozi.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16078c75a0f425---dazamede.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda8379e962---94983535933.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073584235400---nedexupusuvufigipadexedom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ielts+to+success+reading+test+3+answersPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 19380 bytes
SHA-256: 3a7f7488b366d49b79fa3a532c42137da3657b17ee550bbb752e12ee2450ee35
font_01_sfnt_off00014892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14892 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_02_sfnt_off00015d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D9D 55132 bytes
SHA-256: 1e02cff9231daf7cfe536e430c3aa0bb7853113c8fe09817b17a74ce404b5d2e
font_03_sfnt_off0001f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00020abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20ABC 10856 bytes
SHA-256: a2ca2b54cbf6f709ad0400a351ac0fe589f07ed7f86dc3ca2d3b717d2fd2676c

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