PDF malware analysis — malicious · 42fcf928e02dda91

MALICIOUS

PDF

77.0 KB Created: 2021-09-07 07:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 8472522ed515a660e99c2e87d4e7aeb9 SHA-1: a074ed1a873865f2e44612590e6fa57398915bc0 SHA-256: 42fcf928e02dda9105f055dffdda6ed5955de1ada25d762ec278afde2a7a6b01

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9901

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://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160739e2696436---4308913603.pdf In PDF document text
- http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sorom.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/t5vo8a9f0vrr9vii581p0amdun/wibasubefifilutow.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a24f3fa30---89451763958.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608faac1c6e14---70991822699.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f941632ea7---9498879284.pdfIn PDF document text
- http://bachova-terapia.sk/images/file/lopitejudegavixuvi.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/844d5b18e70d8ac923949a30f9cf274b/4861257338.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/d5aee09cac13ee2edef0b599bbf85a98/38671592728.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/a10a9c33ab7c0eb6597dd8b32f3d520e/piluvetujaw.pdfIn PDF document text
- https://store-connector.com/_upload_bilder/_filemanager/file/fakimuk.pdfIn PDF document text
- http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607379593c80e---8871780354.pdfIn PDF document text
- https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/23d09f78c6ad557d1702b607c8316f1a/71951696854.pdfIn PDF document text
- http://csaladiegyteruautok.hu/userfiles/files/68231029919.pdfIn PDF document text
- https://yuss.it/file/xofesol.pdfIn PDF document text
- http://malifer.hu/upload/file/60002382416.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d5f89d318a612eff4400454636687c19/tipaxojijezuware.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/2275148601.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/wajuda.pdfIn PDF document text
- http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71a06c454---tafavokopa.pdfIn PDF document text
- https://carlojans.com/cms/file/gidabed.pdfIn PDF document text
- https://soechi.net/userfiles/file/jalevo.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/qt1uig1uungd7mibk6on8gsuf3/vepixujitoperigawaw.pdfIn PDF document text
- http://morethancars.nl/uploads/edytor/file/83169085089.pdfIn PDF document text
- https://brothers-music.com/ckfinder/userfiles/files/80774310896.pdfIn PDF document text
- http://hopkinshigh1988.com/clients/75739/File/25475621584.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/d115e345d31ccb3fc4c6f40d81cba50c/64548494991.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=c+programming+tutorial+pdf+in+teluguPDF 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_off0000cb1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB1C	10804 bytes
SHA-256: `5400dd3a7f0e82603ef612090230cd3ff9d103cc3c912a19dae55260047dac4e`
`font_01_sfnt_off0000e3c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3C5	16620 bytes
SHA-256: `398ed52ff90d8998c255192752eddec5f03a183ac82c7b4475e6a8438d66bcfa`
`font_02_sfnt_off00010e35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E35	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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