PDF malware analysis — malicious · 75d30736f5648ea8

MALICIOUS

PDF

89.5 KB Created: 2021-07-01 16:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 6741fc7afc5c279ec10631fe511fb1f0 SHA-1: 629ad3d46684d23bee1981595abb241ece673d91 SHA-256: 75d30736f5648ea86ccfd847f881280cc30c3a0a8ed9bf79031d1fcee8032c07

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress uploads and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to exploit users.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=wow+tomb+of+sargeras+location PDF link annotation
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/3b118a85f5a7e59e75b4a9b22d8d0ad0/jefovikiva.pdfIn PDF document text
- https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/7c68159f9d8195dad49a201b50345ef4/tabazegupulave.pdfIn PDF document text
- https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e33f34624b066e1d7e916b1ea9b3f7c5/87158844410.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609741d3bab82---52834368191.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/d5026c1e191344a671cf1b03a7c9be13/37620737156.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d71b99800---90996230027.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/vuvuxavidedil.pdfIn PDF document text
- http://www.alexgis.com/siteuploads/editorimg/file/72672881025.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/76364467068.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b5ccb3e68---xivipezusolefegezorug.pdfIn PDF document text
- http://gdwtechnology.com/fckeditor/file/kunodujigefakuvu.pdfIn PDF document text
- http://myucmas.com/userfiles/file/19795802354.pdfIn PDF document text
- http://tipiland.net/upload/file/didikodilopetubabale.pdfIn PDF document text
- http://fsoa.cn/userfiles/file/20195714742.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160889ff5e7f74---41223119704.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b59c837954---nejijenu.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/11c842588fc91ce9256ab1cbdb559d54/25077515891.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ef55e46a975947d1c5a5f18592085ecd/nasezeruxole.pdfIn PDF document text
- http://animationcoach.com/userfiles/file/penotisipa.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4cfc0ff44522d3170d07d1479736a7cd/taguniwidovev.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/6rnjonirb54jh871bcq7pi0hn1/domipetogarevitevoma.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9974d5e49---19807873294.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021051401555616.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b69cbaace01---donarar.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_off0000fc16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC16	16768 bytes
SHA-256: `cf869dae954f0069db937895710b2fd8f29ec663c85b9eb192f83f1c3bf980c2`
`font_01_sfnt_off0001278c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1278C	10900 bytes
SHA-256: `b845b686e4197780e970ea17c0978a75f682214a01b995569d6d5ba6860fba0f`
`font_02_sfnt_off000140da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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