MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing lure. The document's content, though heavily obfuscated, suggests a social engineering tactic to trick users into installing a browser extension or update. Several external URLs were extracted, many pointing to compromised WordPress sites, indicating a potential distribution network for malicious content.
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 https://coretry.ru/uplcv?utm_term=packet+capture+apk
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137cac25137b---67251031886.pdf
- http://hydrem.ru/images/file/72522247676.pdf
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ifjq23kt2e7l1p5il6r15hlbo0/ruvagenoladakoji.pdf
- https://jagamimpi.net/contents/files/mijeribiladen.pdf
- http://aarogyamedico.com/userfiles/file/pazorulilaropavuwatut.pdf
- https://kstraders.com/userfiles/file/gopojit.pdf
- http://elandtour.com/FileData/ckfinder/files/20210910_11FA4EF1C2418562.pdf
- http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71004930682.pdf
- http://azizavacanze.com/userfiles/files/79434680544.pdf
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0b5f462e8---jadegi.pdf
- https://www.bmo-agencement.fr/ckfinder/userfiles/files/57886874133.pdf
- https://cristalparkhotel.com/ckfinder/userfiles/files/mudoxodem.pdf
- https://mimpishio2bet.com/contents/files/78709126001.pdf
- https://noursportevents.com/wheelmarine/userfiles/file/gulugavepumefowus.pdf
- https://jahanchart.ir/data/files/file/16544559027.pdf
- http://candientushinko.com/images/file/51497220192.pdf
- https://otoform.com/upload/ckfinder/files/77846160954.pdf
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613b629a0f4c9---riwawupibog.pdf
- http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348feb83739---27471813921.pdf
- http://cungcapbaoduongcuanhatban.com/upload/files/75207447728.pdf
- https://mobspace.xyz/web/img/podborky/files/52819889400.pdf
- http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/zegegiwobulovewaboxeluja.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_off0001049b.bin70930c06345fe36bcf79950de71789c9a4bdc5020cb7276a06ae93b3ff33d98c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1049B | 18756 bytes |
font_01_sfnt_off0001359a.binb90c00826e42dd6dd43e27accfa6b5b2c292c97716b695b8959f03ff611501c1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1359A | 10028 bytes |
font_02_sfnt_off00014c16.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14C16 | 16792 bytes |
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