PDF malware analysis — malicious · 2a6b72f9d6f421fd

MALICIOUS

PDF

83.1 KB Created: 2021-09-14 15:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 8d701369e409f3723f4c155027809f1b SHA-1: 67dcf7e095bd3a2b5505574e0caf6871dae042a6 SHA-256: 2a6b72f9d6f421fd64caef9adf5e123db75c0576bae7537cec7140e3c51db212

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection pattern indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://ketchas.ru/uplcv?utm_term=virtual+no+root+pubg PDF link annotation
- http://doubler-son-capital.com/photos/files/98794016328.pdfIn PDF document text
- https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/19859717098.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4b7a222ee---65585999092.pdfIn PDF document text
- https://podiummagazinenews.com/ckfinder/userfiles/files/zaxojutilapulogomi.pdfIn PDF document text
- http://lrm.mcdonalds.ua/ckfinder/userfiles/files/48731130462.pdfIn PDF document text
- https://lalicorne-hotel.com/userfiles/file/rofanek.pdfIn PDF document text
- http://lamorenj.com/userfiles/file/76266228729.pdfIn PDF document text
- https://detskeihriska.eu/ckfinder/userfiles/files/38350079107.pdfIn PDF document text
- http://dighakanchaninternational.com/FCKeditor/file/96089283126.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/50755f1a5b7f93f0faf17e7c8c3653d8/fofuzevuj.pdfIn PDF document text
- http://toeicspeaking.net/_UploadFile/Images/file/62196984837.pdfIn PDF document text
- https://clinicamanila.com/ckfinder/userfiles/files/roxesokujafozonaze.pdfIn PDF document text
- https://infotechloyalty.com/bot/ckfinder/uf/files/mafugararagipovuz.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/esjhup8mhdua81adnneqf8ocok/5208403573.pdfIn PDF document text
- http://ossokahve.com/upload/file/rumudetitajasuvediripemop.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613006e5ccc96---82127905323.pdfIn PDF document text
- http://langeline.com/ckeditor/upload/files/lumakofebowolatu.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_off0000d8fd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8FD	20584 bytes
SHA-256: `2842e3432aa16b0cda6146a442eeed4f2138ab05becf7fdf17b9aa4803cc7886`
`font_01_sfnt_off00010fed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FED	10336 bytes
SHA-256: `07fe12fe168f450f1d327717f5880ea44a35be45f045fc656359f6b69f8d28e0`
`font_02_sfnt_off00012716.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12716	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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