MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites and using UTM parameters, suggest a phishing or link-farming campaign. The document body is heavily obfuscated and unreadable, but the presence of external URIs indicates an attempt to redirect the user to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
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://synerhu.ru/uplcv?utm_term=acids+bases+and+salts+class+10+ppt
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce1c4ccef---turalufuvazuwivupu.pdf
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/877d560cc6622028858a83cadc9e330e/nebinamekajedusinukegave.pdf
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/51cd971982aa3a1a2fe8cd2a762380d3/32380670126.pdf
- http://aksaaydinlatma.com/img/editor/image/file/71533152521.pdf
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/s08kp72v1a0cretnavo9jmbvlt/66243688017.pdf
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46c7232071---pemub.pdf
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3fcc3aa7---95279174991.pdf
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160812c0621f24---gotuxilesofumasemigoji.pdf
- https://blokhol.com/upload/files/rowojilata.pdf
- https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/jgggqgrnuu6dcj8bcaqtckfl8r/resugasutikitapere.pdf
- http://naasschoolofmotoring.ie/fckeditor/userfiles/file/92182607603.pdf
- http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099b5ca98a12---limuxojuzajuje.pdf
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0ede29t9c2m3pmfn5tsmp5ng2/74395780165.pdf
- http://www.dawnrotaryclub.tw/UserFiles/files/lumuvukag.pdf
- https://10kshot.com/customerinterview/ckfinder/userfiles/files/38750420147.pdf
- https://aadharshilaschool.org/userfiles/file/noponinuviwojaja.pdf
- http://df-2.de/images/daten/file/93067454148.pdf
- http://to-tuong.com/media/ckfinder/files/tovulimugikejin.pdf
- https://tonere.shop/app/webroot/files/userfiles/files/35568755268.pdf
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072353b80f35---xeledowibebeseg.pdf
- https://murten-hotel.ch/userfiles/files/rofitaruxemigupurexega.pdf
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608088ff7384b---diwifogodar.pdf
- https://melz-feu.ru/upload/41249393941.pdf
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3aa197cdf2bdb5dfa9f65b63aff01901/xotavisajiwo.pdf
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf7de0a361---58034625092.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_off0000e556.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE556 | 16792 bytes |
font_01_sfnt_off0000fd6d.bin44efb837cea52bba33412a4beb577135cf9741f03ab818fcff392fa59e91caaa |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD6D | 10584 bytes |
font_02_sfnt_off0001158e.bin9b316742ab6d0f2f9d03d4d105a97906cbd29be54383ad9f618913bdf280372f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1158E | 18248 bytes |
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