Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f2cbd28c5779d2…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 09:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ac269e9f55ab00ca27448947e7ccaeac SHA-1: 6f6795258365a0ec1e831b6e34f938d9a5048603 SHA-256: 45f2cbd28c5779d28b5b45e68c5b1d43deff1b30a0569c7772d9332c5016d883
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites, indicating a likely attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of link farms on disposable hosting and compromised CMS uploads strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0640b70fe1---2027225190.pdf In PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/hnqlbaqo279j88anrd0a74a4jl/xipejikenazitanipawukepit.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/20455053140.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/861c0b5bf06167046e495e4733bf86a5/83391963720.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf14d2e54e---renadugudi.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/54507043990.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93b75de29---89693468025.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a93bc87ff7b---43155784385.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072651b5f987---xurusogadutanekimofonipo.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/zidapodeju.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/e1dd5350755851039e8f37ad85441f32/16223861679.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/xigelumilimazikozopabex.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/suvejarupevowe.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b20ac68cc5---32230632994.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3f9eeeeb3f9dd4cb40f3fbd919bfd7ad/26232181033.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/018445a38633d1e8e9757ed67258eb54/tapagogari.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/uipllpf9q7gjmd3hmaf0hofin7/zutin.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608883b81105a---27387702022.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9337cd81---71441884393.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/juputemoxamoposajad.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/85332963003.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/34268981415.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/83613899370.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210610140609.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6cho5dpf74uac2t9jm677b1lk6/renix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+shepherd+boy+and+the+wolf+pdfPDF 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_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 10808 bytes
SHA-256: 0bc459d4ac0ac80b625aa56311d33394824cca1340cd4f705b13312beb93077d
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12012 17692 bytes
SHA-256: a3b8c62b2e46c95fd54f3215cc432ac406d328545924fd3f5f574c2102f03d60