PDF malware analysis — malicious · c5580eb6b6cd72d3

MALICIOUS

PDF

88.9 KB Created: 2021-06-25 22:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 6067c606f62ea02a65ab5f2188ffad3e SHA-1: 501d9b2671380d88985a7122e09ea97c06b191c7 SHA-256: c5580eb6b6cd72d3f9b28e513b5f2cd15d36bfab92b450b0ffdbf1e346c99bce

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests the document's purpose is to host a collection of links for malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://drafthe.ru/uplcv?utm_term=mountain+dog+puppy+for+sale PDF link annotation
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/a252gqmc7rru3f2gav1bjjtrn0/5858024159.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944b90e67c8---37959661806.pdfIn PDF document text
- https://guapa2.com/admin/fck/file/posagupab.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82a158b5c---25094590123.pdfIn PDF document text
- http://uniquecharacters.com/upload/files/42104715419.pdfIn PDF document text
- http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/fa327c2bfee18d27c291f698e05f740f/33652072190.pdfIn PDF document text
- https://stillwaiting.org/userfiles/file/19742505735.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48516636cc---kuzosi.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/57800931969.pdfIn PDF document text
- https://vestol.bg/files/file/noriremenojunove.pdfIn PDF document text
- http://russkiivopros.com/images/FCKeditor/file/67956045248.pdfIn PDF document text
- https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7222717e1efe5328a9b7b42f27f4ebf0/20189973437.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cbee868d---44195169838.pdfIn PDF document text
- https://xanbiente.de/userfiles/file/12825127364.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160793c7c5cf58---kigofewetukatefikotixogaw.pdfIn PDF document text
- http://mkngsp.ru/upload/files/nudogigilowobitazegobob.pdfIn PDF document text
- http://polyalpan.hu/_user/file/kojatuwowuzuga.pdfIn PDF document text
- https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/cf1995198967a8835cc0ad3b5f9f02b2/25825708826.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6f31754d5ab593dff40359d4a013c001/72305039656.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/0b6e6e3d48f4563d907368d46dc45b53/jimetekudu.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/58f44d9dfb363f2d8058af5fa6516611/96674047793.pdfIn PDF document text
- https://rezgame.com/calisma2/files/uploads/tuteten.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b98aa37e1---fevagujabepivuf.pdfIn PDF document text
- http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d77068787---tugunosudajomuvada.pdfIn PDF document text
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ch1gcns45r9l97u2qtm9ks89o0/momegidekajarugow.pdfIn PDF document text
- https://autopratichesas.it/file/99275985045.pdfIn PDF document text
- http://asupuro.com/upload/save_image/files/7094346030.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f486.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF486	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C9D	10880 bytes
SHA-256: `9dab8bf53ee02c911bd57608b1c59618b2bb7f56159ed8532f1425e726444a35`
`font_02_sfnt_off000125b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125B9	18232 bytes
SHA-256: `d894b47f9e4bbc011ebbd8e934d87306283533b31e66a73df11cc9e3f5709bdf`

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