MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains multiple heuristics indicating it is a phishing lure, including a 'link farm' pointing to a compromised WordPress upload directory. The primary URL identified, 'https://infrive.ru/uplcv?utm_term=quotation+of+brother+and+sister', is flagged as an SEO redirector, suggesting a phishing attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.
Machine Learning
- Nyx PDF Classifier malicious score 0.9830
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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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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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://infrive.ru/uplcv?utm_term=quotation+of+brother+and+sister PDF link annotation
- http://diysmart.net/userfiles/file/73396381820.pdfIn PDF document text
- http://siltherm.com/ckfinder/userfiles/files/vexigupi.pdfIn PDF document text
- http://clairvoyantinfotech.com/demo/images/nerubosima.pdfIn PDF document text
- http://mppscstudy.com/admin/usercontent/file/gofemakimalibigekud.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4e9282db---dajojin.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/b98cf0bf179b0fc86832c6b251070991/rikubedov.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777cfc36d5---56422449926.pdfIn PDF document text
- https://chp-travel.ir/data/file/97452180919.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3f79d866f68b3468e5044b0059525e8a/bedujoxonazasewoboxo.pdfIn PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/oafpn8md0cci7omp72l7tquf01/96929677616.pdfIn PDF document text
- https://autotronics.vn/userfiles/file/sobux.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/41ba09c08efb58e3997fabee9cd26794/baladozoxufexozupizu.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/n3rvshu9so23rahqu6meec4vv2/nulufowifabam.pdfIn PDF document text
- http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0cc9fdb4---88933414644.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/pmnl2njp74utdu73l7f2sa4k93/rinamujimesoten.pdfIn PDF document text
- http://musorcentrum.hu/files/article/file/nizikepunidiguv.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/dufafogi.pdfIn PDF document text
- http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec2c835ada---zeparozuratubafokavuvofi.pdfIn PDF document text
- https://usssecuritate.ro/userfiles/file/79278181630.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860a13d9b08---masefefomunarexifisu.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/f0a84ee560058e399fcb551285d90583/68796354136.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a00ee497b4f---mikosenex.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160903489638b2---boganaterenodubegarudo.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f674be83d4---51442415413.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/163c64d583244037f92d7d0cc99a6cb6/ralubibuwemuwefogiribixix.pdfIn PDF document text
- http://tiramisu-o.com/yamituki-n/uploads/files/lefikorajusonedasuloti.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/rh1tb3md41ueiar6ttuuampi9n/xumowadevuve.pdfIn PDF document text
- http://cupta.org/userfiles/files/20210619165608.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00033358.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x33358 | 10704 bytes |
SHA-256: 16cf74e4c9715b73b1d7c4c612156066b3007f7183813a08792a94c2298299ff |
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font_01_sfnt_off00034bed.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x34BED | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000363ff.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x363FF | 20596 bytes |
SHA-256: db136fd7980366c9e410c9f14a9bb420fd8af5251ddb049d183a2c2c86418e77 |
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