Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca516abb72470d6…

MALICIOUS

PDF

75.2 KB Created: 2021-06-27 19:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 503e258710cd6fc7b9874d5f0d0316f1 SHA-1: e91580e3629a9b402b99d1c92bcf71508d27e385 SHA-256: cca516abb72470d6ac65717b58ec9800828f628112ee9be7d1573b7d9ca83c18
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://coretry.ru/uplcv?utm_term=valves+of+the+heart PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/781d4f26a2a7654733cb9648f2ff056f/36864074053.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/bosisepidoku.pdfPDF link annotation
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc47b981d3---63053382315.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/349be9f79a866dc029784082147bf66e/munavid.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-8/20210508184909353919.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608048f116da3---17880702550.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a2f12864---pusababupageda.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/32083684288.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/17e5d0950ac12d377c44b0afe77ad666/11897368078.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0046b6fd42b5b176d2253d35d6fd0c9e/xosafilipagolebikuzad.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc071cef7c---gosoxavusifagufukore.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/99820426166.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210618122556.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/v9c60ot0fsjcltgvg4brcvmps6/36241366015.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/92867185953.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/2515251403.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/org03kf4362dnh6mc2h058hoo8/sijutesif.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/947f36e412a2b132f9ae2861cf0c1d0e/tijokakaj.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/lamezexegomudizamuvusudet.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d12a6fa6b---sirisokuxurisusiwoj.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/23967243363.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec536de317f7aca2fe3e2235e692cffe/fozupit.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/be79a228eebed050e16b4f2901259a4a/kifefako.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/96357315051.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_off0000c767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC767 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 16072 bytes
SHA-256: b0d088e9de3d8da57b1a1dd22b30579adab1257371e0d93d8d2b55689c60e953
font_02_sfnt_off000108ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EF 10148 bytes
SHA-256: 4993f6e05dde7a7d45c4afc0e57d60b95a23f53d62cd062e1ae20279aac819e8

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