Malicious PDF — malware analysis report

Static analysis result for SHA-256 207e7600e0b0d875…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 23:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2306aaeb7d9ca7f79b58cda6a2b28bf3 SHA-1: 4899353d5f7a53504b8590b0aac39baf6b8a49e5 SHA-256: 207e7600e0b0d875d02696c5629bf7e1373781173b2389696403ce138dd4b6ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports the conclusion that this PDF is designed to lead users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bbf469dd2---46371885126.pdf In PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16095297776423---35179567428.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/vomoruxigowebali.pdfIn PDF document text
    • http://web5gstore.com/Files/files/61721276199.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/35i27e4lan207d3uovjo11dr1l/91523999326.pdfIn PDF document text
    • https://saam.vn/images/content/file/11215997900.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fade480c315---48663406067.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/794af719ab9f1390a5e2f77c8746d99d/tumiwizititesosef.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/fakoliwagirijesilexa.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062420255673499.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/wakavoxun.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/5727705741.pdfIn PDF document text
    • http://ropesadventure.com/d/files/34030497742.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/5bg9n1g862hrv30e74valtgcb4/xagopunikigomasu.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/29070966000.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/00c7a31475a89cded3131b9653f6996e/814531964.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b68d59f7f---jokagadawekelabelomekabe.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100ef99eec0a---luzopezolarezufuf.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8813d1e231f4d4713f277c9218806611/66539110507.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/92837536001.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/tamurenejixoregedib.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f7b73c8dd903442981c4ea1b97bde0d0/dodekixupuwakawox.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/kevopewifatif.pdfIn PDF document text
    • http://cmtsport.com/pliki/xabizete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=foxit+pdf+merge+onlinePDF 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_off0000c386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC386 10592 bytes
SHA-256: c0d674b50a3f6ebf050be52cd486c61310d61a1760df1c4809ae4a22a5f29e7f
font_01_sfnt_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 16576 bytes
SHA-256: 82a2df61384cbc5636b473dce8977ebea677bd194bb36d9ad863c78c80ce1bf1
font_02_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1