Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08e002c84e043e4…

MALICIOUS

PDF

83.0 KB Created: 2021-07-01 13:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dda684cce92a8f642528ca8d3a921804 SHA-1: ca7da609336b63e1f9f0266f50c65ade96628301 SHA-256: c08e002c84e043e45676c0e37b0968e3b4e3afb4f78ea3b302b28eb15d3a74b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160755cd60434c---dazorabogagilezedavi.pdf In PDF document text
    • https://dentalrud.com/userfiles/file/53411361660.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608422088db67---15942465747.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/65169253748.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b54a4c18c---jiroboviwesejiru.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/98622298107.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/3e3ab95385348b93286b5016bf985d9b/xedobunonenatami.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/pasekisupugakejolikuti.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160999de229530---12227949950.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/ruworikudom.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/9ff834651c644cae68817a867e076ed2/82121734589.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881f1e22517---wasebowozav.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833ca3bbe83---12590671801.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/1af7e6cefdaac329be547ce7798d9829/49183517815.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075d025cbbea---wenizezetevinexanivi.pdfIn PDF document text
    • http://newo.ru/files/files/95349193857.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a61c7cf22---84885686312.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857cee21593---jabafikozez.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f46fe3df41ab697165abb81cb452e793/83742152719.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/s6eikf4b13015hkofrq9brvuf0/fimazakemixeganopuzoni.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/lunatufodigizab.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/846ea8d798ae974121c4379d8386250c/tedanodutoraw.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082df7da76a9---jedemisuzaxagudev.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/gubutixuwip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=basic+contract+formatPDF 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_off0000e103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE103 17636 bytes
SHA-256: d0274556198fb905b79422151958b4a05787cdec4573968094a312fff6b41185
font_01_sfnt_off00010f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 10372 bytes
SHA-256: d0e153a8fe0ab3c7cb445b7b031ae80abdbf8da6e33b2933f798bf403c0f3cbc