PDF malware analysis — malicious · 799b80aa7472ce3a

MALICIOUS

PDF

121.9 KB Created: 2021-06-27 21:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 364da23f5383a677ff6bf87335b8f448 SHA-1: ed1b5bf8c4da15e65ee7156648efcc16ab862625 SHA-256: 799b80aa7472ce3af076bf31abaec0e89834eaee480b50a660bfa7bcc7ac1d0e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised CMS uploads, suggesting it's designed to redirect users to malicious sites. The presence of numerous unknown URLs further supports this, as they likely serve as the final destinations for the redirection chain.

Machine Learning

Nyx PDF Classifier malicious score 0.9875

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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b57eb05ce---66666967771.pdf In PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c609491b42b---sufajagiwolupifilijitit.pdfIn PDF document text
- http://zabradli-znerezu.cz/userfiles/file/rajubukinumiwodenikemor.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/1rtju2jv59p7i6tatsomvris8q/56013948252.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/moxebogu.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ba70pa9jonaops6o57voi66ie1/40650622178.pdfIn PDF document text
- https://myphi.biz/nbloom/fckuploads/file/8685129643.pdfIn PDF document text
- http://tlumacz-lipno.pl/pdrzewiecki/files/sawetizonamejixuseka.pdfIn PDF document text
- https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c6aeef21add9fc9e122dc466c2e70c47/suzabuf.pdfIn PDF document text
- http://sns.hu/_user/file/24808430054.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b081e2738d2---94473212618.pdfIn PDF document text
- http://zrdb-drogbud.pl/Upload/file/60608748670.pdfIn PDF document text
- http://jrpst.pl/userfiles/file/vamuvavazijodo.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0c13ddd12---77308975929.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/nndbaouemfbe1knu4o8q7tscg0/29059067322.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e824915859e5a11ff47b555645c90a38/nesudusasuwijajeli.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/3sobipq0c51snbhievb5721nl6/89457288491.pdfIn PDF document text
- http://ranaghatpchsschool.org/userfiles/file/28523955205.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3b8662345---tapipaguzolonudejazal.pdfIn PDF document text
- https://tennis94.fr/img/pics/files/9005027291.pdfIn PDF document text
- http://anvlaw.com/userfiles/file/xufutepul.pdfIn PDF document text
- http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa70162a14---97306179944.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae711f73d2e---4309465388.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/tmmerj5qqg2lmglrljon1dds4s/zadosipijodeji.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ehl675btojj092bv2tp4vnago8/59734195448.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=4+grand+unclePDF link annotation
- 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_off0000e071.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE071	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f87f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF87F	60456 bytes
SHA-256: `13c13fbb46dd2707147481df2c4bd200d7102c4dabc923c767337df64e377ab0`
`font_02_sfnt_off0001952d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1952D	17964 bytes
SHA-256: `7db30b9236d996d28928e338b6decae2fd914c0e604b6c39585d83d6ca6f14fb`
`font_03_sfnt_off0001c35c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C35C	10148 bytes
SHA-256: `ab62ce2285ed6816dfb33b0bea88d44f2ce93f624a8c08283134223994c98ff0`

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