PDF malware analysis — malicious · 1d44e831c5245f58

MALICIOUS

PDF

87.6 KB Created: 2021-06-27 06:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: fb400b1fb15449226f9493af3fe51166 SHA-1: cf827c052c114d00f75286d68d9c597e80a7a011 SHA-256: 1d44e831c5245f58ed88e2ee511167baef0aae3aba07defa8dac73127aa2ee6f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for phishing content or further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=weight+loss+diet+after+c+section PDF link annotation
- https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609723a4b2209---minenubiledul.pdfIn PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/5267fb304ac10bcc6f943aceb9ca31b4/vuragamobufidizi.pdfIn PDF document text
- http://marketypik.pl/zdjecia/fck/file/47767355967.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95d77aa68---87295565757.pdfIn PDF document text
- http://pekingtogo.com/uploads/files/19459212365.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/tixefotifabinebalujene.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bf275572dfb8ff697628a2d85b0a8499/50996511554.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4165328d6---vetepakejokig.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/39611431757.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0717911de---12363184864.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/32809670014.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/p7h3hath96gljnc99njl7kinc2/71215753143.pdfIn PDF document text
- http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/niveranav.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e629f03967---20927157569.pdfIn PDF document text
- http://bsl-trans.ru/admin/ckfinder/userfiles/files/60869719612.pdfIn PDF document text
- https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e63d2c5cf4---nonivitopuredusobanofob.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/eqvc5o17stnbudvhv6h6v1hqp3/86620775182.pdfIn PDF document text
- http://broadmoor79.com/clients/864886/File/58435451842.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/h9u1j49nv6h3s13bmcqutrkrr0/vitagigo.pdfIn PDF document text
- http://aydinservis.com/ckfinder/userfiles/files/15798603352.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca1eabeb2---74091761776.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160942651719e2---gebikixalusememuvotif.pdfIn PDF document text
- https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/0d1be57daed3239cd7827ca8e0e8b132/wukawerizobet.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/mnb3rmttkoq59ke85v2ksaab8e/rinenurure.pdfIn PDF document text
- http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16078acffe224b---98527789490.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abae7a58fc0---71421309061.pdfIn PDF document text
- https://medlineplus.gov/diets.htmlIn 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_off0000f4a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A5	16824 bytes
SHA-256: `3533151275c665e7266b47e51fd6a02c44bdfc9e4dde166640f673a5cd22fbf0`
`font_01_sfnt_off00012087.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12087	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001389e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1389E	10748 bytes
SHA-256: `adddd965bfa1f7cb3df909564d4a842cd09dbce0f95abd8c9f6ed5fa4b9bab64`

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