PDF malware analysis — malicious · 34aa67557315d917

MALICIOUS

PDF

88.8 KB Created: 2021-09-08 07:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: b57031ddd06595128567fcfac1e299ce SHA-1: 2373843134d002b2c7080969d84d5344f6c9660e SHA-256: 34aa67557315d9179bbf917f4bcbfa0dc2460e2416345977284676b608bd1ede

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting. These URLs are likely intended to lure users into downloading further malicious content or visiting phishing sites. The file's structure and the nature of the URLs suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

Nyx PDF Classifier suspicious score 0.4651

Heuristics 5

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
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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609877bc7f8c3---kavexoxupedap.pdf In PDF document text
- http://nutronicltd.com/userfiles/file/60755221379.pdfIn PDF document text
- http://insureavisitor.com/userfiles/file/6954093042.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d8a9e87d9---50367999300.pdfIn PDF document text
- http://duoctruongxuan.vn/userfiles/image/file/pidiri.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074175e0857d---wuxajizokabazukirakuda.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b99e337f4c9a96df7565f80fa235a5c1/naziworik.pdfIn PDF document text
- http://pytextiles.com/userfiles/file/vuvov.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f58c642231---tidevivifesunup.pdfIn PDF document text
- http://nguyenphat.com/public/default/ckeditor/files/zelovoruvovevumokafofow.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/t63vpqkinf9djtfg12tst9shp6/25884531219.pdfIn PDF document text
- https://rubenferro.com/userfiles/file/rumavasofoxivo.pdfIn PDF document text
- http://lapenya.cat/imgjovesnaves/file/jobutow.pdfIn PDF document text
- http://doks-films.com/pcms/content/file/fomufujigunubilusi.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f7f699d86227fdcb663cc4b1f7eb8c56/35534669683.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb03fe0a3dd---dewufavop.pdfIn PDF document text
- http://bagiez.com/userfiles/file/2455347603.pdfIn PDF document text
- http://tsmsaldature.it/userfiles/files/3181632385.pdfIn PDF document text
- http://iburgisidimarsala.eu/userfiles/files/bokikofalazaf.pdfIn PDF document text
- https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/dejewefatipukotaxadoni.pdfIn PDF document text
- http://robertfeinberglaw.com/images/edit_images/file/penesakilidixojozan.pdfIn PDF document text
- http://nail-free.com/ckfinder/userfiles/files/62514488415.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mazda+6+2017+workshop+manualPDF 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_off0000fdc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDC0	11180 bytes
SHA-256: `91d476e3beb3453f36808cce370b8f8deac5c34d5836d9f07f07ceedc77c53a9`
`font_01_sfnt_off000117eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117EB	20208 bytes
SHA-256: `66ac9ce4e72d4acd8a6c92dc139866ee8cc30d55859ef09f13c9c78bd5f2fe49`
`font_02_sfnt_off00014ca5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14CA5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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