PDF malware analysis — malicious · 3d5d25c5fa623361

MALICIOUS

PDF

70.6 KB Created: 2021-09-29 02:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 4865bf55ae59cfb6abf214e86027e71e SHA-1: 92f936d476a885baa7ad97d9511f5bff764ba499 SHA-256: 3d5d25c5fa623361451631c86f2c4e085744a302931d8f2d7e9130c06fe6a850

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to various PDF files hosted on potentially compromised or disposable domains, suggesting an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure indicate a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://carrieres-pierre.com/userfiles/file/60476735765.pdf In PDF document text
- http://xyr59.com/filespath/files/20210911220450.pdfIn PDF document text
- https://ecowaytechnologies.com/ckfinder/userfiles/files/61345745968.pdfIn PDF document text
- http://ctcinsulator.com/uploads/file/fenexavafefetigit.pdfIn PDF document text
- https://jaurrieta.net/USERFILES_JAURRIETA/files/55950443314.pdfIn PDF document text
- http://www.first-classlogistics.com/image/upload/File/28310175861.pdfIn PDF document text
- http://facilitymanagementassociates.com/survey/userfiles/files/77222374651.pdfIn PDF document text
- http://romengo.com/ckfinder/userfiles/files/vogodijuseki.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613eef080aaad---bekijolijudosibuxak.pdfIn PDF document text
- https://sportcity.bg/webroot/img/content/files/kemizududijewozorafutoxub.pdfIn PDF document text
- http://www.taimaobi.com/admin/ckfinder/userfiles/files/5545429921.pdfIn PDF document text
- http://grandviewgroupresort.com/upload/files/balimokisaxaboluzel.pdfIn PDF document text
- https://fundacjanadzieja.com/images/wyswig_images/file/73240856768.pdfIn PDF document text
- http://lacasedescaraibes.fr/file/43543682034.pdfIn PDF document text
- https://detectagsafety.com/ckfinder/userfiles/files/womazubadubuterasesonerox.pdfIn PDF document text
- https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9c8907a1e5d074b8fd3d3813efd253dd/gadonijip.pdfIn PDF document text
- http://demkapi.com/resimler/files/91228022239.pdfIn PDF document text
- http://www.perlodrink.com/documents/43279002612.pdfIn PDF document text
- https://qnzar.com/files/bazutelaguminugu.pdfIn PDF document text
- https://sogelec-eng.com/files/ckfinder/files/janosozoxasobejego.pdfIn PDF document text
- http://sisparts.pl/zdjecia/fck/file/buzumuwuvolatesomurotoxon.pdfIn PDF document text
- http://www.ks-klinika.ru/ckfinder/userfiles/files/zanaxuno.pdfIn PDF document text
- https://gtselect.fr/ckfinder/userfiles/files/mawefugetojemuvomefox.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614913310262a---makufomabesebudi.pdfIn PDF document text
- http://www.bc-arman.kz/ckfinder/userfiles/files/fopezapanuso.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=newlands+law+of+octaves+explanationPDF 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_off0000b4c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4C1	15468 bytes
SHA-256: `adf55d8b62f53d14be66b640f35f8bd914b0c532a2ba022d0231e24495ff207a`
`font_01_sfnt_off0000db97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB97	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f3ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3AE	10744 bytes
SHA-256: `c456f445e00631c3dce489b7c68e6c8c317aa2dbfa9fc19410fe60bc6463057a`

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