PDF malware analysis — malicious · 4566da31ac039ef7

MALICIOUS

PDF

95.9 KB Created: 2021-07-08 02:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0a54d959817e2105c7010565100ef879 SHA-1: 665222901b2d25175974ea95cacda6e4a9e38af7 SHA-256: 4566da31ac039ef779f07c265748c030ddabd9d051eb864f5ca1edef76384b7c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded links indicate it is likely used as a lure for phishing attacks or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

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://coretry.ru/uplcv?utm_term=maltese+chihuahua+mix+puppies+for+sale PDF link annotation
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e525d4aecc---74350021269.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/eeba3217b9cb17b4ce5229da60823b50/movujeverusulinodukexiga.pdfIn PDF document text
- http://ttccid.com/userfiles/file/62947143299.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/fnescruhrbh74i8uek0cuvd6hu/zirufag.pdfIn PDF document text
- http://aite-materials.com/upfiles/file/46037404269.pdfIn PDF document text
- http://alfavs.eu/userfiles/file/razuregagufewesikoxejew.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/93db666c0d35649482e7cc2d2460c68b/baguwi.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/634893cf8c6ee5321e4e2f2514db1b1d/85330341495.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834ea3854fc---40109624883.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/8014707038.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4256457015---37258685436.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce6fdc610---neruwafelezogep.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a573b0e0c84---xobuwigiw.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/542019d3bdcf06134153516a6736d73e/88759145142.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6297c6ebc22961b421aa657f47dc02fc/lawukedot.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/rl4mri94315jsac7nuvth4prqk/47578266313.pdfIn PDF document text
- http://centronegozi.com/public/95403902693.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b3e7e3fb07155b47360e7a4f8e8178e9/vobegurojix.pdfIn PDF document text
- http://altinay-law.com/images/file/78195292783.pdfIn PDF document text
- https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/sqnqnndihkqshsu7lrragphsab/39018456743.pdfIn PDF document text
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/6c4bf7fecd589038e87835afb819832b/xuxulizam.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0431a3f9a6---18904033339.pdfIn PDF document text
- http://rheinmotel.com/userfiles/file/jakegaf.pdfIn PDF document text
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2623bb37f---279497055.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_off00011299.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11299	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012ab0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AB0	10836 bytes
SHA-256: `b9d2bda6405426f317160cdaca9f2d8acebdaa086fd07757494ce812608f032d`
`font_02_sfnt_off000143b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143B7	17680 bytes
SHA-256: `df1b484c85f2d9437af076da018d581a274ee398a6582fe5f2d2c96ca864470c`

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