PDF malware analysis — malicious · 06ec94acb29825d0

MALICIOUS

PDF

77.0 KB Created: 2021-09-04 09:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f63265513013d7511983da151b4fd7f1 SHA-1: f130f53e2cd39838bfb3d7d1eeced306146ac3c7 SHA-256: 06ec94acb29825d01da20a31f2a5756f2bfd03ff09d9fe01652eaa589476200c

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting. The PDF itself contains no readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

Nyx PDF Classifier suspicious score 0.4146

Heuristics 5

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
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 http://yyfxsw.com/upload/files/57891438428.pdf In PDF document text
- https://zivotzaokny.eu/res/file/rukaxamuxepagumaju.pdfIn PDF document text
- http://ijdssymposium.eu/upload/35047215193.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5cd0b4d2---vatosetibifo.pdfIn PDF document text
- http://kiszelyugyvediiroda.hu/docs/file/19085820528.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7cbfd396cb47803daf26460fbc30fb78/lubegomajimomurotan.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/dc35a6060efe7ed988107c2e7e59d7f9/widesukufamuje.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1917e41b42b4f3ffceab4431e9cab1b6/dapodat.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7e3e721c1e6cc539c8dd0daef8b68762/91713212583.pdfIn PDF document text
- http://focostrade.com/files/20210627000025.pdfIn PDF document text
- https://podgoricki-klub.me/userfiles/file/37986384491.pdfIn PDF document text
- http://kalmi.ru/upfiles/files/labole.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff968a589e---bufaxaduvepelunozidarinum.pdfIn PDF document text
- http://marthomaiticherukole.com/userfiles/file/sililafuze.pdfIn PDF document text
- http://puzynowska-kancelaria.com/userfiles/file/9379446921.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/716037e766ffc8a08c1420292b6097df/91640660708.pdfIn PDF document text
- http://architettodrabeni.it/userfiles/files/kiwikosu.pdfIn PDF document text
- https://solidpractise.com/files/userfiles/file/79674957537.pdfIn PDF document text
- http://pune-india.info/userfiles/file/wefixarijapawetexasud.pdfIn PDF document text
- http://angelcabrera.com/FCKfiles/file/74748391222.pdfIn PDF document text
- http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/75216665492.pdfIn PDF document text
- https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/0cca1394b3eb1d10509194300208440b/vumojole.pdfIn PDF document text
- http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/luteviboxelijeto.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/bg18g00hcgetf7bu91cmo09ltf/569750718.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=after+en+anglais+pdfPDF link annotation
- 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_off0000d4ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4AC	10532 bytes
SHA-256: `6926868a353c2cc861304a589e7bae4fbd6852255badda8d006600956b362090`
`font_01_sfnt_off0000ec8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC8F	19668 bytes
SHA-256: `84938fa4236a7cbbbf186c3ca2070993ccfd884815ce5497c8c74d51fa34a26f`
`font_02_sfnt_off00011f0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F0F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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