PDF malware analysis — malicious · 4e3bbbcb45202256

MALICIOUS

PDF

100.9 KB Created: 2021-08-02 10:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19

MD5: 627cc4d876e5986f28acb100863af20b SHA-1: a7c130a7e7611d4f5ab9b5506732160d47c1d816 SHA-256: 4e3bbbcb452022566c1b7ff0ae3c43f99b1fb8bc8c9d9986733a3b8d78d660dc

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9867

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://medvor.ru/uplcv?utm_term=ejercicios+de+letra+cursiva+para+imprimir+primaria PDF link annotation
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d9n31q7k2g1pn53ao8br66n771/98238915058.pdfIn PDF document text
- http://poledance-chrudim.cz/files/file/zolenomofogugijawasinaw.pdfIn PDF document text
- https://twfern.org/upload/ckfinder_temp/files/20210527171033.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3eb0457ec3af00f23861b1d673689787/2075779028.pdfIn PDF document text
- https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/6a4e0cdb30b72f0b70811c6e12025e93/puxesukeromelofuvufabikan.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/5528670491.pdfIn PDF document text
- http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/gajasirozuweramivosov.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a530fa170aa---70070622065.pdfIn PDF document text
- http://kartywspomnien.pl/uploads/assets/file/pesiridonibizotur.pdfIn PDF document text
- http://liburnia.pl/userfiles/file/kowupinalufipu.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075aba665852---mifipinidubenijofisas.pdfIn PDF document text
- http://masterkontroll.hu/ckfinder/userfiles/files/47255625514.pdfIn PDF document text
- https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/38669a3baa49f517de9b072822ca90d1/fofojazukixufunijebepisop.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ad96a6775---dovisewibufabusuferovu.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/c8vsttduq6psnpmlqe0j7injgq/zaxunejataxotalobari.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/788e042abf4e6deb41e417a7e14a3707/lexefip.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088c3c16936e---24386323763.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/hrv4idopkrvpit49v26kd9hp07/22474185488.pdfIn PDF document text
- http://jarosi.hu/files/file/41807325979.pdfIn PDF document text
- http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/75250427777.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/56d86e3a0503cf317640f5d31f09b685/48914883450.pdfIn PDF document text
- http://taiwanquinoafamily.com/shopadmin/upload/files/pokodavewilitovav.pdfIn PDF document text
- http://lhsclassof68.com/clients/73441/File/92466259743.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a217f3ea6b6---bomesuzer.pdfIn PDF document text
- https://autoprofi.ua/userfiles/file/56922205168.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/7423396460.pdfIn PDF document text
- https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/295umprpg31ei8o2s4bvbafmvi/nezowifiwetitafarufivag.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000109eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109EB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012202.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12202	10852 bytes
SHA-256: `12dc32191b2109f14827750641e4f8e718550e4fe1ef8ef15f003666f7148f88`
`font_02_sfnt_off00013b10.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B10	19440 bytes
SHA-256: `50687b8b0b138606e9e5a96f332d571e586377f2e0b98b64758882aeac5a6e53`
`font_03_sfnt_off00016ccc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16CCC	16068 bytes
SHA-256: `6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d`

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