MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a password-protected archive lure. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host and distribute malicious files. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate the potential for embedded JavaScript, which could be used to facilitate the download or execution of a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9835
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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Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LUREDocument gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 http://wuxihemei.com/ckfinder/userfiles/files/20210615_161004.pdf In PDF document text
- http://interel-rus.ru/test/sites/default/files/file/varameloxisopuga.pdfIn PDF document text
- http://farmaciacogliate.it/userfiles/files/nurolemanuvefopewalowot.pdfIn PDF document text
- http://griswoldremgmt.com/uploads/files/nuwiwokipekazuxud.pdfIn PDF document text
- http://dokumsuzgec.com/userfiles/files/tisulu.pdfIn PDF document text
- http://nghiencuuykhoa.com/uploads/userfiles/file/70207204047.pdfIn PDF document text
- http://tsutae-f.com/js/upload/files/74905578772.pdfIn PDF document text
- http://nappsa.org/userfiles/file/wajuzeroxiwuxi.pdfIn PDF document text
- https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080facb23ed1---mapudomo.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a94777063c9---bawofizapozasazip.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd681600dee---waxoguxek.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/41290843d7db94feccc0705f16d0f040/19464630644.pdfIn PDF document text
- https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5eee77344d8cc1a6fd7bfa4038630d5c/8154334314.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/orvd8u74h25bsmb0h24a65i5j3/50356628633.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/8f50a2149e01c26d5567af7366a1e12d/fuwisanozutawokifuwavod.pdfIn PDF document text
- https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609520d172ab1---7893655182.pdfIn PDF document text
- http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/zevomobokokuzokaguwow.pdfIn PDF document text
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde70245793---19911733939.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1716ff0f---27855210448.pdfIn PDF document text
- http://moscow-vernisage.com/files/files/jagonimidaxo.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c880fae6f9c---76999842535.pdfIn PDF document text
- https://manenshop.com/upload/files/wizonoxiradakilu.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160dc39e146662---45928672628.pdfIn PDF document text
- http://belst.by/upload/file/tipivogiranazutabukega.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f833fbb38acdcc959e5c00610fda0d4b/jotelikozexufomo.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a420ccf0bd2---85983608259.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=alpha+helix+and+beta+pleated+sheet+structure+of+proteinsPDF 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_off0000f5f7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5F7 | 11040 bytes |
SHA-256: c04ba356a3cb205f4b38f03bd45b241226e334e038efb7a2f4523b3bc60a3bb5 |
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font_01_sfnt_off00010f63.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F63 | 18664 bytes |
SHA-256: 1989dbff0468f07359c8f2ce2ce571f75e09363622d74b0a31a57388bc8210c5 |
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font_02_sfnt_off0001408a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1408A | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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