PDF malware analysis — malicious · 47442ff4147e38dd

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 00:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: d49e13f3cc4f97835589dd0c2e95c100 SHA-1: 01becb8fff31b10ff896b6f65f2c428635f5589d SHA-256: 47442ff4147e38ddb794ba8cc0a0f0b6cf234c7c83d653fcd721fcc3713c2ec4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious content. The PDF itself appears to be a lure, likely intended to trick users into clicking the embedded links, which are hosted on disposable or compromised domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9762

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://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/e8a24e449ce9287126fe572a2de52cf1/razatetonunobediwo.pdf In PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607529b919532---20795836458.pdfIn PDF document text
- http://pivotal-technologies.com/userfiles/file/nenanilikobuzopujopid.pdfIn PDF document text
- http://chalappuram.com/userfiles/file/kutijegixelenegutosenufa.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826dc5f2f63---kakiturofexekogezifozuxe.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/07222a2ec7871d6d88ecad489183e53f/50370478234.pdfIn PDF document text
- http://shsuorui.com/uploadfiles/fckeditor/20210613/file/16236178969154.pdfIn PDF document text
- http://afgventuregroup.com/cfiles/file/77432390782.pdfIn PDF document text
- http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/15538139422.pdfIn PDF document text
- https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/71moaj46v1kijgot7ecmimii7k/serarafubinamaguves.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733d1e32eb5---73772447597.pdfIn PDF document text
- https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa3e88163ec425de870832da656988da/95159473706.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbfd065e5---2196402399.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/52bd8f978b2e64b10ffe0b369c522f2a/jamaneg.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6o79j4oaq0dnrqvr6c2movkp42/83293243200.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/88e353edd4304c5932d36419ad837a2c/94756806872.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa1ce0935b---lusivimozolire.pdfIn PDF document text
- http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/sewatupuxidirofad.pdfIn PDF document text
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/3e1e8f6e27d3d52c50355f3a24a02cb1/gosizipulogifanoxaja.pdfIn PDF document text
- https://bienenaktuell.com/sites/bienenaktuell.com/files/file/pexiligubalonekaveru.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/3ufq7r69eqmnka06ij2javpg28/xomugivorasajisufiliko.pdfIn PDF document text
- http://wildpflanzen-planung.de/file/18833715607.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/3a95e281da11a598721da947ea11e951/petifisorinexome.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-5-13/20210513083405109597.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/p29as8dhotrjm9jnp3b2s4ej24/29276095387.pdfIn PDF document text
- https://heks-tech.com/app/webroot/userfiles/files/50784448566.pdfIn PDF document text
- https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9112e556ec94d424da4e8b6040cb89ee/safikanazegutuzarazat.pdfIn PDF document text
- http://edumedcare.pl/upload/files/22983905358.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=phase+sequence+pdfPDF link annotation
- 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_off0000e3f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3F4	16972 bytes
SHA-256: `f86f2e0f8bdee7c887a979bf5a07d8ba545e22cf3feb6c5590634389dec9aa24`
`font_01_sfnt_off00011038.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11038	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001284f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1284F	10508 bytes
SHA-256: `f06a600674a67e01bfe7357e0fbbbd0635839dc7c736149513edeb6015895a5d`
`font_03_sfnt_off00013fe4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13FE4	1728 bytes
SHA-256: `164b17f13be751c428b8a7847bfef4401e4c17c2bf41cfc2fceec83f5d69c6ba`

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