PDF malware analysis — malicious · 6816d8c72d710b3b

MALICIOUS

PDF

100.3 KB Created: 2021-07-01 10:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: d7c97d409e31ab5d9dc56c579fee2fda SHA-1: d7517668ccba3a1b7d0ce512c7d3f14b0b35848b SHA-256: 6816d8c72d710b3b6bd7fa2816ade345caeef3c61d401b1840165367758571a3

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign, likely attempting to lure users with topics like 'sales projections for a startup'. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures or malware droppers.

Machine Learning

Nyx PDF Classifier malicious score 0.9885

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://inwebjor.ru/uplcv?utm_term=sales+projections+for+a+startup PDF link annotation
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad737aa752---42869519702.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/380b97b4cb3a73319efb508f48eb0172/94896872801.pdfIn PDF document text
- http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/ef9me8312s15qmdp1g1h1uujsk/67846312233.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7bon1qhlafhu7c4639it9cr6t7/2250811854.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ne1d6o7huupeaa8l0pmtqgdu97/zamubigobegumixi.pdfIn PDF document text
- https://laetitiabernard.fr/images/file/jilizi.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160959090490e2---pemixovelibafidek.pdfIn PDF document text
- http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d900a1672b---10780980047.pdfIn PDF document text
- http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62fb9c25e6---81703875435.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a4d6db8c0---tuzisobogunajenu.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0733f11569---88058895233.pdfIn PDF document text
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078b044eff5e---wubipalixinubudes.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/60b01d87d0df7e9ea5a295bcab8082ab/monimugepifojexinixopipu.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a71a7f36---dazudibiv.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/347ad867183d3f35918cc93e2281655a/gimugabut.pdfIn PDF document text
- http://vds-construct.pl/userfiles/file/xubizikutafiliruteb.pdfIn PDF document text
- https://bozoklar.org/ckfinder/userfiles/files/momaxuxafetaligosew.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11281ae221---14875045196.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/64840cf4d39f3bd6407632ec7fefc524/pozofaragirumow.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/514e8300528f8bfd990568ac62ea826f/73029175723.pdfIn PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/43njcme5sposckma5o68ngui76/fimikoxi.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609695249e24e---zilidikakoteg.pdfIn PDF document text
- http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9108243b1---rebulavoredotaverasokovus.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles//file/xikawukigasixoja.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_off00010aa8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AA8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000122b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122B9	16892 bytes
SHA-256: `53ecf24896c42f6a1eace9e4afb5d98c3331952441498493c6f53843b6a26238`
`font_02_sfnt_off00013b14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B14	18244 bytes
SHA-256: `c61bbca0cccfdd02d3ea918857c005a0bd7e71bc85b71825b10a3b509b749243`
`font_03_sfnt_off00016a72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16A72	10776 bytes
SHA-256: `da161c640261642ae5e21d7ebf6121c40b5985c60b3828b9aedb93d6c9339a6e`

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