MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious or phishing sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or downloader lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9970
Heuristics 7
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://smidgel.ru/uplcv?utm_term=self+introduction+for+team+leader+interview
- http://mwflower.com/upimagesfile///vivutuzixinekalupebut.pdf
- http://carszana.com/image/upload/File/41641441736.pdf
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4d1d15e2a2feb57c8b69fdfc7f695dbd/sopodipefijaropixetep.pdf
- https://chachachat.info/js/ckfinder/userfiles/files/93525270244.pdf
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf9202803---85062023816.pdf
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077878d6c406---vekojulore.pdf
- http://zhouzhuank.com/v15/Upload/file/2021629192398143.pdf
- https://mangonebike.com/uploads/file/rovekewa.pdf
- http://aarogyamedico.com/userfiles/file/62642702881.pdf
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b603a37e53b---lomeluleziwubilat.pdf
- http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/joparegusetobamukun.pdf
- http://cambresisemploi.fr/ckfinder/userfiles/files/samiwovifawiridir.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/197964f6752db7a404bb493b02831aaa/toxuz.pdf
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ceaa9ace49---fiwiwix.pdf
- http://aviatechinform.ru/sadm_files/58901324527.pdf
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/93sl8cscjsjnbc1ujqmm1tiqom/kebigexapivuxozasuli.pdf
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080285fb172c---rewokokixazireva.pdf
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a36cf87d1d4---76880225523.pdf
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9363d8442---66373265711.pdf
- http://nineslash.com/user_file/file/61827676197.pdf
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/va2g9c7hnikoq5pe4p4vpaf765/tomabakejaja.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_off0000efbf.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFBF | 16792 bytes |
font_01_sfnt_off000107d1.bin86123ee9447806bb7878f78dae37d007b6015c10a890a7d3f7a3d0cee596e971 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x107D1 | 15800 bytes |
font_02_sfnt_off00013071.binaced36fea15c94bd0afc5ffc434c46c35d69f9518be7bce2fc813766cdc42a4c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13071 | 10796 bytes |
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