Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca996c02222be9c…

MALICIOUS

PDF

85.7 KB Created: 2021-06-28 19:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c57e13fa5cfc3bbde597075cad87d564 SHA-1: 502db380fb7bbb7ea3aa80f2162b3ceff26a80b1 SHA-256: 6ca996c02222be9c8f6d955411bf03f62838cc065ec464171211ea42ec1b6921
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=appraising+your+boss PDF link annotation
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fo68fo8i3j656erpj30mq2pat4/16019087522.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0ebdbe03---6199377882.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/93985545979.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/b8ef6ffd0d6d3879b52965985687d17c/16881879789.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/tunepofoware.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a476ca885784632b964e9cafc7271cc8/94300890854.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc8e7ae72f---gumiligutetigut.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7e34c30b0---24899487819.pdfIn PDF document text
    • http://capri.lt/userfiles/files/77654182458.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc543ac58c---16416412200.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6da49d304---3499653677.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/dozanipunilur.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/4828840284.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/lolowigadusukigojavev.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210606_123857.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/e9f9ce83b6dc1d206d159c7a161b198a/sojivewujotov.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/29491195011.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094da09adbaa---32274314248.pdfIn PDF document text
    • https://koratspring.com/upload/file/jinitebarokeziw.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3433924135f78407518fb2d6fba3f2cf/67440200545.pdfIn PDF document text
    • http://planetamama.ru/files/file/xuvegujakirenidelaful.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_off0000ecc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 16856 bytes
SHA-256: da2befe11c7fb3f65e7d5bf2e969ddc8772d3bc7dc5ca5206081a34308360045
font_01_sfnt_off000118a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BE 10488 bytes
SHA-256: 706a1dff8b0fe84bf1d4c05d63f0013444e933639ae8419adf7de5fdddfadfdb

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