PDF malware analysis — malicious · 288b4d4fab7073c9

MALICIOUS

PDF

86.7 KB Created: 2021-07-06 20:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 630622f3dafe5bab974a473dd4af6514 SHA-1: 1a889413db4016b21c9b1fb30d61b1f31831fa7d SHA-256: 288b4d4fab7073c930822d64eabee3a4b68656c0a93d0aa7f95b6937dab5bd96

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable domains. These links likely serve to distribute phishing content or further malware payloads to unsuspecting users.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://infrive.ru/uplcv?utm_term=pope+changing+bible+verse PDF link annotation
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25034adf3a---wudidazolasimota.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfaaf13f65---mugemupanavo.pdfIn PDF document text
- http://twothirdsmajority.us/clients/38522/File/gekonoxigabufuzi.pdfIn PDF document text
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b7ebcdb2a---45947793630.pdfIn PDF document text
- http://onlineexpert.in/userfiles/file/37911855034.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160738f85489dc---10112304781.pdfIn PDF document text
- http://sierrahighalumni.com/clients/878712/File/3789434397.pdfIn PDF document text
- https://irrisyst.eu/files/file/64525753456.pdfIn PDF document text
- https://masihpt1.com/contents//files/sujurolu.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/q4shmcapeabqjv9pqh8j4f0ql6/5014745277.pdfIn PDF document text
- https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/bh29a6cat9gutgadio2e65bvd3/baxajanuv.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1ef59c80dc4c0708b17a5ea27e6d357a/bazumexetizex.pdfIn PDF document text
- https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/7cb381aae80451768589d05d3ffc147e/79726984457.pdfIn PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e474d68e---saremaravudugijijelamir.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfd0202c9f---99120882011.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7906e21e1---58991517904.pdfIn PDF document text
- https://tectrongim.com/uploads/files/29278726503.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f5888551---55439236360.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/f68f8dfb758672d0be5684383db47a07/nelisexor.pdfIn PDF document text
- http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074b23f4c812---kupadawodilojoregaz.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/0a5c20abfe10899b132d8b71ed99e9d9/mowimerekubumewizagakim.pdfIn PDF document text
- http://yuha.be/_files/file/24450403473.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/r3755nvkoh802dtqjnojldntcq/sowalikanuzuzajo.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d144ccf6ba---kawumobibubaneteruxelo.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f14f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF14F	16876 bytes
SHA-256: `1e3893f5dadc19fc4017fd7e34681373064dc800f8cfb100ff94609ba8665692`
`font_01_sfnt_off00011d19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D19	10760 bytes
SHA-256: `59bec723075cdd15a0d7d590bd31fb38ea9c7c254bb31ca0b1a35893eecb3c0c`
`font_02_sfnt_off00013592.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13592	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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