Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14a2311e570bdfc…

MALICIOUS

PDF

105.1 KB Created: 2021-07-23 11:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba3827a227d177475ecc7d796d3d5447 SHA-1: f241aa142b86bb5f6d59d1712145044c7bd675c3 SHA-256: d14a2311e570bdfc4419d60f827a0f67b1e3da14c1c2ce266833ba06faee3670
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, likely to redirect users to malicious content or phishing sites. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fletcherfamilyreunion.org/clients/52745/File/62850571142.pdf In PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160886df7294e6---gomelawopubufejujujajewom.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/2632b55c147841236d22ac7fa80db62e/77011834314.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608a30ce0fe8e---62070482178.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/26477145718.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608987b7c34a8---lidalorinefupitilikuf.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/7199222382.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/zivowukaxit.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/17874296105.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/topakudev.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/pepibotega.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad39a899816---ratodapurafafopoke.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/40924043323.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/24136276531.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/wexegugonefape.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607683ac78ee0---35939228009.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f5ad1071f9b---66674168489.pdfIn PDF document text
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/57254085747.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/99495556094.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/89550680330.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/muratizatusoladuram.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b5073b4eb---rodofelovudekuto.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/95754510822.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2gq84o5om3jsvb4hmn07erc8h1/lisuxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fastest+pitch+by+a+14+year+oldPDF 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_off00013598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13598 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAA 18044 bytes
SHA-256: c9c227a2560a8173b52eefc42a6f34799a02adc12e27bc05fee2bea0d9d87561
font_02_sfnt_off00017d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D53 10868 bytes
SHA-256: 046156187ec566be6f098436478306fcda799281c3051da71f901dc3bb1818ca

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