PDF malware analysis — malicious · 78290d3ca38b7c2e

MALICIOUS

PDF

76.2 KB Created: 2021-09-04 11:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16

MD5: ef51e69e3f2428ac56c65d663fcf0a0b SHA-1: b4461d413b0d275510e7cc9b0e0de5efe04a7975 SHA-256: 78290d3ca38b7c2e535e7891e66d6556014767b7c663032ea929063755213910

196 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://huntic.ru/uplcv?utm_term=measuring+length+with+a+metric+ruler+worksheet PDF link annotation
- https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/d61ce4174a678f5fc419febff053ac84/4730169185.pdfIn PDF document text
- http://hart-metale.pl/gimnazjum/userfiles/file/68923144868.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5bc6650ba---54609707972.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab844f6ba80---44394708609.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0a0f37e13---morufajogajoxebujez.pdfIn PDF document text
- http://benefielddarrenfordhicksunited.com/clients/2/21/2186b72972973349411f8b90e6071e14/File/62557021644.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/l190aimorusj6qagbfsafveo27/medabibupuxabigurami.pdfIn PDF document text
- http://amctop.com/board_data/editor_img/file/202106221702.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/810ef5b62f59d06b9abc0578019d7b92/5163420122.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc04cf704ca---rajoloruxuzadaxipixa.pdfIn PDF document text
- http://ajk-opakowania.eu/upload/fck/file/94326753364.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae31e10a99---masajolebozo.pdfIn PDF document text
- http://signauction.net/userfiles/file/3562061701.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/cb60d7a57f597ff234e3e08020d03540/8866105028.pdfIn PDF document text
- http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/41949607921.pdfIn PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/76afbg0kotqbkga0tjldpat0p6/35942920507.pdfIn PDF document text
- http://laboratoriologos.it/userfiles/files/pazaparubimumixukasomeze.pdfIn PDF document text
- http://barsugo.com/ckfinder/userfiles/files/75681076982.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/902c86cc6ad11907076b7ab31d64bc23/36947358903.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e94074b81d---fanamagokewud.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dd025ec9---mumikugijozez.pdfIn PDF document text
- https://sesconbs.org.br/ckfinder/userfiles/files/23803892822.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/2uq3gr7ippor30oao9rmql6pmh/38730545419.pdfIn PDF document text
- http://biosite.ru/images/news/file/72233874389.pdfIn PDF document text
- http://rocincorporated.com/domain.com/images/dynamic_pages/file/rarefer.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_off0000c8a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8A1	10948 bytes
SHA-256: `4b3bb0358c70ee36198bda61ef902a8f8aefae17c4a9a63e5df3bacc8a908164`
`font_01_sfnt_off0000e1e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f9f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9F6	16116 bytes
SHA-256: `51e80c748b2fe5638f2f6092a8706627b3bc0a133ef833e869ed6028cbd53e1c`

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