MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9964
Heuristics 6
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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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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://ya-ke.cn/admin/upload/79563116075.pdf
- http://autoshiftbid.com/fckeditor/userfiles/file/23646318204.pdf
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2dd28e30a---64551537550.pdf
- https://toptenstudy.com/upload/files/BodyFile__60D59DC7C0752.pdf
- http://glotecgh.com/upload/editor/file/mekusefoxevusimijoduw.pdf
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/23c628e4230f33025df9b251fc7763f8/48222766858.pdf
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/1cdb2f01de858c7ab017745451951556/meruradizekopopewulakisov.pdf
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c389afe7602---zelixabevuxuzubizimawe.pdf
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/4tj7knev4fg6do1ntrokfihch8/witumoxisuviwusi.pdf
- https://smilepaper.tw/archive/upload/files/75897796952.pdf
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/9n9onog0d3r0ec08oivv1tiqs8/14845003281.pdf
- http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/lasenu.pdf
- http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429195432763764.pdf
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609924a3b5dec---16077310462.pdf
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/717fc251bc7e454e659803f192b5f24c/weralimalitipo.pdf
- https://lensprovn.com/ckfinder/userfiles/files/xepolisaxej.pdf
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eda6d84079---32524665918.pdf
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/c290e2679d13d23b358472e15740d0e2/52979631513.pdf
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852c897447f---zudebonozavajebijuzif.pdf
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/9d9caf8be5d331a29876777b864c0cce/75158084923.pdf
- http://doks-films.com/pcms/content/file/tavukofufu.pdf
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6f270e37da6868928268b65caf1370d7/gojixagetemuziverexa.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=periodic+table+puzzle+chemistry+answers
- 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_off0000f5ef.bin7f293950b27e9f455bc272db7a7122a4ee4387414faafec96ad29c0d4d8580bd |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5EF | 17108 bytes |
font_01_sfnt_off00012277.bineb56052240aa9ec9bdb8d16bd4dca8f9b421835d3e0724e89e1885e25e005023 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12277 | 11280 bytes |
font_02_sfnt_off00013ca6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CA6 | 16792 bytes |
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