PDF malware analysis — malicious · 3c85c48e4ef649d7

MALICIOUS

PDF

110.2 KB Created: 2021-07-05 21:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 9d3075120bd1aab3c27cf85068e884c5 SHA-1: af21553d594ddab2a46b48638b107ad1e81e4547 SHA-256: 3c85c48e4ef649d7d26a039d8300252425b6d8f3943931bcbf217895098703b7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting an attempt to lure users to malicious sites. The document's structure indicates it functions as a link farm, likely distributing phishing content or further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9666

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://chcial.ru/uplcv?utm_term=class+10+maths+chapter+13+exercise+13.3+question+9 PDF link annotation
- http://malachowiacy.pl/files/file/5775084599.pdfIn PDF document text
- http://obasekiestates.com/UserFiles/file/13034638267.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kdq6nqdifg4085jlfutatpfer7/48258282302.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/gigojimulikugoxejisid.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607250a735ddc---6075696987.pdfIn PDF document text
- https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f920c050de---domevonitumizejosazer.pdfIn PDF document text
- http://taitung-house.com/CKEdit/upload/files/diguwojuxabupa.pdfIn PDF document text
- https://xo-sound.ru/userfiles/file/96921973820.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b24fd926072---pisajeferasivagenoji.pdfIn PDF document text
- https://lawina-radom.pl/files/file/3057067810.pdfIn PDF document text
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/2a9284586204dfc0cc3e14b699a9f589/foruzirulepuwutonipiso.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073095c17908---debovusewutuwetosopefuwi.pdfIn PDF document text
- http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/164621762860ae032a1f578.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa28a1d62---gigaxafilewub.pdfIn PDF document text
- http://zulaikhatextile.com/userfiles/files/gijasisunupe.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d020f5efd66---dusidesawukelipi.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e87213523a---tutabujipodosoj.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/514e597bfc36b07ca073f8060aedfb1f/zuxupojudi.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/206ea54340a3e0b1b3a22e3669856814/89403797433.pdfIn PDF document text
- http://trunglam.vn/uploads/userfiles/file/11467561503.pdfIn PDF document text
- https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/d2214790af48a41563b0141a762ae6a9/68425870429.pdfIn PDF document text
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae20cfd6b24---10249613539.pdfIn PDF document text
- https://fotinepmuveszeti.hu/kovagoors/uploads/files/73581319146.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/5am4cm5sie7aqplu26omi4o0o6/balan.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0591e6baff---12366573411.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b44dfcc7913---57461176385.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_off00013102.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13102	18320 bytes
SHA-256: `cae28a6ee09a10c896ba59f5cf0d01757db29c2ab6a421ad128b1dbfef73e9e4`
`font_01_sfnt_off000161b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x161B2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000179c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x179C3	16144 bytes
SHA-256: `1bb543891201b86cb218c82ce0c1e431878b85d3145a79f40ea94bf38162e691`
`font_03_sfnt_off00018f20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18F20	11600 bytes
SHA-256: `417b526ad326f4856cf5dd7d9a48de973d0d5a76e0fc96a3d2f8cfd4051306e9`

Open this report in the interactive analyzer, or submit your own file for analysis.