Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd789e19305a244…

MALICIOUS

PDF

79.5 KB Created: 2021-09-03 00:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c7e8065f24afd463c862cfc5f474afca SHA-1: 414dd6e97c0334c0faa3432099b8ab483b53d3cc SHA-256: 5fd789e19305a2446bd744234f416b10feaec300adebc49cb7c1d4fb2d3c2814
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure suggests it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4752aa8ef---takefevuv.pdf In PDF document text
    • http://thermogroup.ru/uploads/files/61510229937.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2c85fd29---wujidaf.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/benubosuga.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1edd13808---muvidimuvedixo.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/66886584652.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/femubi.pdfIn PDF document text
    • http://dzbnf.com/upload/file///24225128947.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/zudof.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/sebonetid.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630468535.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/76378488a4d18752c346ce9cca3ca412/94358357875.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/nojekexaf.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/647cdb9d3b652d3be35b254a55aa07c0/zidimexobi.pdfIn PDF document text
    • http://envigest.cz/upload/file/tuviz.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/7812602539.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/549718d46fcf8a7b09189fbd9ec123ed/95098035401.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/kemuse.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/lilobogo.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/20338448300.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2a5da07b---45258331463.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/83189179561.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f569bc22f---tinojoxez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=print+multiple+pdf+files+as+one+documentPDF 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_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 17836 bytes
SHA-256: a6c17af8694f24fa3ec908212fa84d7888f32d4f8fd62356d9e63f4f27764e9b
font_02_sfnt_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 10884 bytes
SHA-256: f8f791263c12ecc17679f5717bc6738200960378d2bf173178d86446e9f0a721

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