MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF document contains heuristics indicating it is a lure for browser extension or update installation, a common social-engineering tactic. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the nature of the lure implies a potential download and execution of a second-stage payload, possibly via JavaScript embedded within the PDF.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
Heuristics 7
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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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://polkovnik.su/upload/file/95465538405.pdf
- http://jianianhuayule.a9188.com/upload_files/art_files/files/20210906_174533.pdf
- http://sprostredkovanieuverov.sk/res/file/vobimimonilopul.pdf
- http://kaymccarthy.com/immagini/file/22527140423.pdf
- https://jakspravnenapsa.cz/userfiles/file/kifovetifaboxon.pdf
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143f3679d15b---63813298385.pdf
- https://projetovm.com/uploads/files/28671610873.pdf
- https://ecoverservice.be/gallery/file/83600799505.pdf
- http://goraku-sangyo.com/userfiles/file/87602123268.pdf
- http://geredekombiservisi.com/userfiles/file/35943451238.pdf
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/drdv8hml6rjtl7qujp0rqc2553/wikepikik.pdf
- http://air-con.ru/upload/files/mulasutagugewotomu.pdf
- http://vetcasatenovo.it/userfiles/files/2930409073.pdf
- https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/fodixuzu.pdf
- http://ristorantebiscione.com/userfiles/files/xopej.pdf
- http://ser-buk.com/userfiles/file/8039952271.pdf
- http://dangkykinhdoanhkiengiang.com/upload/ck/files/zodewa.pdf
- http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613348659eb44---tomuteven.pdf
- http://onlinemidias.com/ckfinder/userfiles/files/9817134751.pdf
- https://matharu.ae/userfiles/file/tomenuzimodexetegatogexu.pdf
- http://3suntech.com/UploadFile/file/20210911000850786.pdf
- http://sdsenlex.com/upload/files/10499564515.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=play+protect+app+not+installed
- 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_off0000ff22.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF22 | 16792 bytes |
font_01_sfnt_off00011739.bin3bdd717959be08567911935330fcf1223cd3d6d78187ab7cd8065a954886a020 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11739 | 10624 bytes |
font_02_sfnt_off00012fac.binb77d77e3b1c22d8c0a267d04bd3abb0c5434cc4431a2a687c493e401fd40739f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12FAC | 17908 bytes |
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