PDF malware analysis — malicious · da5ddb1d10f02605

MALICIOUS

PDF

73.8 KB Created: 2021-09-03 20:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 68a16c4a239c08730f40d180f816e6ac SHA-1: b2ab7b3e0918c8a6600dbd5a0acf68f0eca29d3f SHA-256: da5ddb1d10f02605495e856ff4993fbb863eae58d4361a5402db0e4dd9041ea2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, identified by heuristics as a link farm on disposable hosting. ClamAV and an ML classifier also flagged this file as malicious, specifically as a phishing trojan. The primary attack pattern involves directing users to potentially malicious external resources, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9885

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/dfb8928f65aaa86963d7009f38394762/zunobedexuvida.pdf In PDF document text
- http://stellar-toys.com/ckfinder/userfiles/files/wibedanad.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/vsqaonigtf3r5chsajj0r063d4/fodiramidakosex.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607209ab83ddf---43040065367.pdfIn PDF document text
- http://banhangcongnghe.com/upload/FCK/file/vovuf.pdfIn PDF document text
- https://samirkumarpaul.com/ckfinder/userfiles/files/rusesos.pdfIn PDF document text
- https://zoldlepes.hu/userfiles/file/gawurinoleroti.pdfIn PDF document text
- http://tajesink.com/Uploadfiles/files/komezazoguvabo.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8dcf943221---vodel.pdfIn PDF document text
- http://cheers-gifts.com/userfiles/jogawibud.pdfIn PDF document text
- http://creativeindustries.ru/uploads/userfiles/file/7967818414.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8b6272c407b90dc5b01bf805578aae91/sagotij.pdfIn PDF document text
- https://arichaindia.com/userfiles/file/wirezab.pdfIn PDF document text
- http://mebco.ru/images/file/wimivajip.pdfIn PDF document text
- http://anaminfo.com/attachfile/file/8693674302.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/3m8avan9ilb1jtrr74o0jja98a/patemonelosumaxapopuxigav.pdfIn PDF document text
- http://sochi-vitrazhi.ru/ckfinder/userfiles/files/pedufufizesabugagotewop.pdfIn PDF document text
- http://mebizstekla.ru/userfiles/file/lasewakakad.pdfIn PDF document text
- https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/l2511af9ljr2koae7k40nepuqi/93372594251.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610e29f35bc1c---jaxagutagu.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/812239a7c51756df9e027f7a34887e44/kipovufawoloresuzox.pdfIn PDF document text
- http://koreaticketland.com/userfile/file/11933093261.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834f82398be---97910305781.pdfIn PDF document text
- https://evermoral.hk/upload/file/1626692105.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a24adb1f9---75702819877.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091abd7ce72a---gufem.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073771b566bb---38290123358.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=legislative+branch+crossword+puzzle+pdfPDF 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_off0000be7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE7A	11308 bytes
SHA-256: `64253f386a0b1fc5a815bbae45748e0f667a57a204d9102a5f382f4185dac827`
`font_01_sfnt_off0000d8ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8AE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f0c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C0	16012 bytes
SHA-256: `ac7b621d368e388363b4406d9c688505c4a8bb9902a6b704b396cce8570e7575`

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