Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec23cf6fe5daf66…

MALICIOUS

PDF

274.2 KB Created: 2021-08-20 18:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60ab1baf1c6a72701475f2c1185ae62c SHA-1: e10447f1b7840ceeda2c468e451621efab06a2a2 SHA-256: 2ec23cf6fe5daf6627aa7d6b089df9e253ef45e8506058dceed05d81ef4839ac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains multiple links pointing to compromised WordPress upload directories, suggesting it's part of a phishing campaign. The embedded URLs are likely used to redirect users to download further malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

Heuristics 5

  • 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.
  • 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://rajakeempat.com/contents//files/jofabuganigaj.pdf In PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee71d4c36e6---voxafemafozu.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19ffaa1180---powatukifu.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/1b05b39fd779e9b35cda50179726e5d7/17952531717.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021080203200873499.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/39c072d2c905ba12b893d37587013ddf/55963500686.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/55334477913.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b364d1d2991---54658474513.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608613c837de1---78371855353.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607b655f96f8e---xigez.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0703/92b2e4fef5ae13cfc1b6b6ac93a4104b.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2277bd3e12---42187180147.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842c098fe6---21132779192.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53149114186.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/347ed12a8b09ba8f3f08735a210c8060/28764102025.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/miwemodare.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/86146264383.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/povuzelifewogaju.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818b82575ad---53159833557.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e04e6a04e---nepilukuzoxapuladazegejes.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/544bf2726c5155b7cc309cb72f1a9a11.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/56297863965.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608678ad67efe---kokosiwimebo.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607846373f955---65992805223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=reading+and+study+workbook+pearson+chemistry+153+169+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D565 12184 bytes
SHA-256: 39965332f4c867ef1b08cf15aa005454d78d7b097c2229b641ef3ed7373a9245
font_01_sfnt_off0003f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F25A 18404 bytes
SHA-256: 4f727751d0066a0aac781007715e4561cd16498c78beb02c159ad5184ca08c19
font_02_sfnt_off000421c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x421C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.