PDF malware analysis — malicious · e192a9f86c64e8ef

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 09:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: b8a3fde5582590f73ed7074b27780b1c SHA-1: d694bbbe99cfaacc28889312f3e5f6fe878cbb6c SHA-256: e192a9f86c64e8ef48589cbed7b4ba0d24b8df9dc236a198030136d42f5480f4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is structured as a link farm, with many links pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://medvor.ru/uplcv?utm_term=hematological+test+pdf PDF link annotation
- http://agcslohian.com/userfiles/file/14201342420.pdfIn PDF document text
- http://mamaskitchenorder.com/uploads/files/xepajoluwuzudusoko.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/3vhd25l9jrcrt0nsampo44jpd1/3175331110.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd930bb75a0---vujutebuvedok.pdfIn PDF document text
- http://puntolinea.org/userfiles/files/nubulowukiwuvifi.pdfIn PDF document text
- http://fabriziocar.it/userfiles/files/ritakatetuxitizesex.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e0f0b5ec---topeparevovuwad.pdfIn PDF document text
- http://everest-c.ru/ckfinder/userfiles/files/6716887390.pdfIn PDF document text
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6900bf202be63f15e8135d275733d7ee/nujujobapesarokadubuz.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/81e15dc8d049431ba6abc2eb616f8d2a/90740243999.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4552b90a02---xudoxijeluwetujimilufeno.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f37a7166fb---jubowesuliz.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef741c5194---sibisebuzusobuzimegaguje.pdfIn PDF document text
- https://saintarseny.ca/sites/saintarseny.ca/files/file/34525843303.pdfIn PDF document text
- http://smartpaintingplus.com/userfiles/files/kevifisezirorobaw.pdfIn PDF document text
- http://amdind.com/userfiles/file/laditijefigajoripo.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edc35b00971---3231342732.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/264df93e83f950d44269e58ee4ba648f/38134023289.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160765d6f5c28f---vijimujinuwefamido.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92d06d147---14353230087.pdfIn PDF document text
- http://kielcenoca.pl/files/file/tojela.pdfIn PDF document text
- http://ngocvietbungalow.com/upload/files/10647652022.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2bcc9d5b---bufulogemilowiruves.pdfIn PDF document text
- http://yearbookplus.com/uploads/ckfinder/files/xosuz.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_off0000d5e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5E4	10752 bytes
SHA-256: `3b4cab966219faed1b8622c743d2b8c25dcf296526ebe2a7a3ee30fd8d940784`
`font_01_sfnt_off0000ee60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE60	17472 bytes
SHA-256: `e7a09a9817974b3dd994727f0ec9c6b3264c3e4fc4607e2db3e06b7462485461`
`font_02_sfnt_off00011ba7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BA7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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