MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or redirection scheme. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing content but likely serving as a vessel for these malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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 https://archism.ru/uplcv?utm_term=sincronizar+google+calendar+con+calendario+android
- http://palaciodelosnavas.com/userfiles/file/78091009496.pdf
- https://taucaotoccatba.vn/images/news/files/60970551152.pdf
- https://isagrinio.gr/userfiles/77867465533.pdf
- https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/xeveman.pdf
- http://teacherandtraining.com/coj_u/KK/userfiles/files/fudexalusomagutunugesek.pdf
- http://avvocato-callegaro.it/public/file/57760027826.pdf
- https://tdfstore.it/file/61816253455.pdf
- https://almuhja.com/ckfinder/userfiles/files/78332074034.pdf
- http://skogsformedling.se/bilder_umeny/File/12650231010.pdf
- https://dananeye.com/uploads/files/202109081953065461.pdf
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef8829db9---44510864672.pdf
- http://weforyou.it/userfiles/files/garalijaxamalovo.pdf
- https://bbpartner.cz/userfiles/file/52377464550.pdf
- http://www.almansori-ye.com/almansorifiles/files/46399575472.pdf
- http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/wirem.pdf
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16145fc7a4b6aa---77107921687.pdf
- http://ozgu-yapi.com/firma/files/jubawovojefulisosemuj.pdf
- http://kazuma.ru/ckfinder/userfiles/files/dejezokesixerulawotawasap.pdf
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fff566e9a0ebce4796161cd5909b6607/40510696476.pdf
- http://tongrentangthai.com/UserFiles/file/47973226760.pdf
- http://uniquecharacters.com/upload/files/jupovupo.pdf
- http://dafangtour.com/fckeditor/userimages/file/mamupowujumexox.pdf
- https://seedomoretravel.com/files/files/kaguvegojulomej.pdf
- https://fptica.ru/images/file/wifanoxeneto.pdf
- http://zeshengtecphar.com/UploadFiles/FCKeditor/20210913225320.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_off0000bdd4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBDD4 | 16792 bytes |
font_01_sfnt_off0000d5e6.binb3656ec09a5c42cae67f454b32d0c8e6c8101604ea410d7ea2081ccd767d6de4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD5E6 | 18840 bytes |
font_02_sfnt_off00010699.bin13c7d8c498ad551486ca52b920c075d9760fa0c1b31dc04444ba03b13d0f590c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10699 | 10416 bytes |
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