PDF malware analysis — malicious · 7ef01e3d27af7778

MALICIOUS

PDF

76.1 KB Created: 2021-09-07 17:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ca6ff5a7fb15b25a7fb38ef5e69ef869 SHA-1: a247cad4b1d3de49a41f495d7937bf54938cf4bf SHA-256: 7ef01e3d27af7778f72398899f7b14bd22006a2102112da1b1a4a7c915d89a5e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to malicious content or further stages of an attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://drafthe.ru/uplcv?utm_term=nosler+reloading+manual+7+pdf PDF link annotation
- https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/f3f3d359f181255cf2b0f65efc635f8e/rafogadavovejarupiv.pdfIn PDF document text
- http://paradisoseminatrici.it/userfiles/files/jeweku.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/au59lbdghp0r738sqeab5l2quq/68170417757.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aed735169---12405198936.pdfIn PDF document text
- https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/7e496f4849b5981c95da0acd61b17be4/senisoxeweguruzedowigil.pdfIn PDF document text
- http://www.mediagrand.hu/data/editorfile/dedoxuw.pdfIn PDF document text
- http://edu-tur.ru/userfiles/file/52600870758.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac705ac03a5---55161685638.pdfIn PDF document text
- https://petikdaun.com/contents/files/93129145396.pdfIn PDF document text
- http://www.celso.org/download/zupolux.pdfIn PDF document text
- http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/desor.pdfIn PDF document text
- http://cukiernia.eu/upload/files/6613986111.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c5f8f2c74f9ed5d351b2b7bf8e4d88fc/jikulabozisijiw.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c844ac0cce5939615cf4d911f999ee67/66965941614.pdfIn PDF document text
- https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/25e2bc98a31882fac8578bc77741f7d8/gazapav.pdfIn PDF document text
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa51bae03f---79315187029.pdfIn PDF document text
- https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a20cb179b5b628858f2bf405879003dd/jutuziralivixisu.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161242e62d8dc3---merili.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eac5hipsc5raatlidktu39fqg4/pipexe.pdfIn PDF document text
- http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8f605113---66774381581.pdfIn PDF document text
- http://s2ipower.com/survey/userfiles/files/jalewekivofifowagagafi.pdfIn PDF document text
- https://bucatariizidite.ro/printuri-fi/files/17207895779.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab81838db2a---zuvezenojopi.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/namolilu.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5245cba82---nejegexabonexuz.pdfIn PDF document text
- http://regcureguide.com/files/files/48585665879.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_off0000c254.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC254	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000da66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA66	17744 bytes
SHA-256: `0e14d624c02751b30eb32b79e97cca2ed95ee9bc8bf67ea48970e885cfb3675a`
`font_02_sfnt_off00010858.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10858	10872 bytes
SHA-256: `bd8453b698a810e08c32fe2552322b6db513dc2e6052b8d2c4ce72d463fe6ac4`

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