MALICIOUS
184
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. Heuristics indicate this is a fake invoice or payment lure, and a callback phishing pretext, suggesting the user is meant to click a link to resolve a supposed issue. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload via the embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9987
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://crewmak.ru/uplcv?utm_term=plan+comptable+pdf+syscoa
- http://ahxxzx.com/userfiles/202105/file/pizafi.pdf
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607259fdb2a5f---8640090657.pdf
- https://247hvac.ca/fabulous1/uploads/files/87636340267.pdf
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1611d8fd07d93c---7893694797.pdf
- http://aqbnb.com/uploadfile/file/poluvipatav.pdf
- http://kreativitaet-stadlhofer.at/global/images/userfiles/file/12256185565.pdf
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/tpe7v0r5hm6m28g9v18v02hm8h/81263764070.pdf
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d10dc467b---bubenumexavekotetapa.pdf
- http://le-bouquet.be/userfiles/files/36629978924.pdf
- https://aadharshilaschool.org/userfiles/file/siraxilonojamejine.pdf
- https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/dd958206f27cb859c616b3e8c711e4e3/mawiwixaneduj.pdf
- http://guides2alpes.org/uploads/file/duxufarufumeneromigekekot.pdf
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ebefd6081---62233527644.pdf
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba867d07fd---87286930668.pdf
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hv9a41797dv3vfaqi6hmiehgq5/38583591180.pdf
- https://majubesar.org/contents/files/tesafejoximakamutosamul.pdf
- https://moolans.com/uploads/files/mibaf.pdf
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/60c62fc3f2ba19d53712b10e8a9d026d/72680790726.pdf
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/kanaw.pdf
- https://doktor-ara.com/userfiles/files/99105343964.pdf
- http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5l017msjv2kvs2q2ihedsd9qmf/2203079801.pdf
- http://rolmech-strzelno.pl/Upload/file/lovosim.pdf
- https://bamfieldrental.com/userfiles/file/jotenekumemukim.pdf
- https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/1b683a1e86a10703daf90a6bc1e88eeb/78452335160.pdf
- http://imhkayseri.com/resimler/files/xumepabujobixominusewol.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0001593a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1593A | 16792 bytes |
font_01_sfnt_off0001714c.bin448868dd62184c35e83d6262c0ac1a2412956e37bd745f4fd7d7b551bf704bf9 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1714C | 19628 bytes |
font_02_sfnt_off0001a3ce.bine8c3c057fd1ce8449bba570f97162d1613641411dbabe84f3e6a87a7b3dd30d2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1A3CE | 10844 bytes |
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