PDF malware analysis — malicious · 44de094efd74ae0c

MALICIOUS

PDF

72.8 KB Created: 2021-09-03 05:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 7f326ceac6f770999468c6a892956e6c SHA-1: 9cc4daae693ce16f8020390cbee5a0b5eea83977 SHA-256: 44de094efd74ae0cc07003686239cd36cc079e01244a49c646674939277b501a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit users by directing them to malicious content or further stages of an attack. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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 http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743f3f0dd9a---51191998810.pdf In PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607617eedd1f9---97847992306.pdfIn PDF document text
- http://naturalmis.com/userfiles/file/33087712281.pdfIn PDF document text
- https://alistairmills.com/ckfinder/userfiles/files/29891916537.pdfIn PDF document text
- https://ambient-interier.cz/files/files/5833554121.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/jtnn3u302tv8ut19acer2flrh7/88242496377.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608207c780d18---mutupujibigoj.pdfIn PDF document text
- https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/7gllmvoernbjodju9g2c2d5rt6/91734642199.pdfIn PDF document text
- http://ecohouse-lab.com/userfiles/file/tatitanusaxexita.pdfIn PDF document text
- https://cincia.ro/ckfinder/userfiles/files/giwisomatonuxemul.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/noforalidasal.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8df50810a4---bulej.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6e46947a4249f3b8c8fb88c06990d29b/vuritoja.pdfIn PDF document text
- http://baloneacessorios.com/_upload/file///27677468466.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/3b82e02087104b8f71a30c7a8c77de40/titemeg.pdfIn PDF document text
- http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608420431d66c---gafaleveferaxelejabudogit.pdfIn PDF document text
- https://prevodi-plovdiv.com/userfiles/file/zubinuvafonemi.pdfIn PDF document text
- https://promise-land.com/upload/file/8447406105.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3c9a57b99b27fdcaa49118ee619eec91/musor.pdfIn PDF document text
- http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/cpcmkll1cngqgkfqmbaa85jgkj/tikosu.pdfIn PDF document text
- http://ginzaramen.us/uploads/files/4145218938.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5cece00e0---73983536630.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9dbbb99a5---minogomekopexilotazasab.pdfIn PDF document text
- http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/xuxekaxogoj.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609117c598ca9---winewanuk.pdfIn PDF document text
- https://cengilli.com/icerik_images/file/16237957457.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bhairava+ashtakam+lyrics+in+tamil+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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b5e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5E2	10956 bytes
SHA-256: `185b8749e88aadef69bcdead8b92af15d30112d5926bd77062a071d96e87807e`
`font_01_sfnt_off0000cf2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF2E	17692 bytes
SHA-256: `39159b8e25a98706c489fb290b3df661bd187e2952b0e5348ebad3c5a6ec6db3`
`font_02_sfnt_off0000fd3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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