MALICIOUS
172
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to potentially compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates that the links are hosted on compromised WordPress upload storage, suggesting a tactic to disguise malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload via the linked PDFs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9960
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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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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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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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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://abss.pt/userfiles/file/59508440024.pdf
- http://galaxyjewel.cn/uploadfile/files/20931013957.pdf
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398443c87a7---bikegabumilaposof.pdf
- https://hotnewsmd.deca.md/upload/userfiles/files/79511831468.pdf
- http://snieznik.pl/userfiles/file/natefuduzebake.pdf
- http://master-vin.ru/files/file/nijobugowojiri.pdf
- http://xn--80aikni6a0b.xn--p1ai/images/file/14194243471.pdf
- http://flyingfish-stay.com/userfiles/file/suzelozotudabamuvo.pdf
- https://knurussian.kr/DATA/upload/files/202109082252462953.pdf
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb21dd86c4---39152528762.pdf
- https://getracemirates.com/userfiles/files/27258321413.pdf
- http://mediasingrid.com/js/new/fckeditor/userfiles/file/83111290575.pdf
- https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/gojifilozamekuwanorazepa.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383bf9e0ad2---pojidunuvov.pdf
- http://lafenicealcamo.it/userfiles/files/sufasufixitexuxirasawa.pdf
- http://nhasachconggiao.com/luutru/files/buluxemuwisibuwanutenewu.pdf
- http://stefani.cz/fck/file/bototudur.pdf
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16139c97548f2a---69397422271.pdf
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t11ue62ka53vjsft8cqr55okc1/karaxetagijiginijusa.pdf
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6cf3f39a13e9a40e3d17d26c555fb12b/96857786976.pdf
- https://tckontrola.hr/files/68697671025.pdf
- https://webmenuplus.com/images/file/gutelunavejesivevuza.pdf
- http://www.patriarca-batiment.com/ressource/site-image/files/47969782475.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=paperearn+golden+zip+download
- 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_off0000d6fa.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD6FA | 16792 bytes |
font_01_sfnt_off0000ef0c.bin9bb4a827973c838da098408090ec172554f78f06402d204d948aaf828fd32c38 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF0C | 17552 bytes |
font_02_sfnt_off00011c97.binf2a791657d8fc9d01fa0ee08cd3ee6312cbbe46312d2aa708c01f749408cc83d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11C97 | 10448 bytes |
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