MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It employs SEO link farming techniques, embedding numerous external links, with a primary lure pointing to 'jaypee physiology book free download pdf' via the URL https://zajinet.ru/award. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the SEO-based lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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://zajinet.ru/award?keyword=jaypee+physiology+book+free+download+pdf PDF link annotation
- https://s3.amazonaws.com/fivebo/lonely_planet_magazine_competition.pdfIn PDF document text
- https://s3.amazonaws.com/radubozufiwo/why_we_celebrate_birthdays_quotes.pdfIn PDF document text
- https://s3.amazonaws.com/wizuluworafid/dimabemexigosujapisavori.pdfIn PDF document text
- http://kutegexuwudaro.getenjoyment.net/canon_rebel_xt_cf_card_capacity.pdfIn PDF document text
- https://cdn.sqhk.co/libobivole/NbSMhd9/9689089822.pdfIn PDF document text
- https://s3.amazonaws.com/duzexefemosaxe/37626848004.pdfIn PDF document text
- https://tamilavijunaw.weebly.com/uploads/1/3/4/5/134506647/sakubinufom.pdfIn PDF document text
- https://cdn.sqhk.co/gejixoneku/Gjtjgje/mimpi_dreams_switch_review.pdfIn PDF document text
- http://kojazunupetip.mygamesonline.org/wazaraxilinanop.pdfIn PDF document text
- http://ganitigusawev.mygamesonline.org/37296901787.pdfIn PDF document text
- https://s3.amazonaws.com/pevarijidasalop/dobukosupowukodi.pdfIn PDF document text
- http://raxewaponoxiv.mygamesonline.org/la_siesta_del_martes_preguntas_de_comprensin_y_respuestas.pdfIn PDF document text
- http://bupimobim.sportsontheweb.net/kolonaporovitemobasatumut.pdfIn PDF document text
- https://cdn.sqhk.co/dijabidasu/vwjhejf/absolute_rc_heli_sim_hack_download.pdfIn PDF document text
- https://s3.amazonaws.com/radubozufiwo/template_blog_personal_gratis.pdfIn PDF document text
- https://cdn.sqhk.co/julubesaf/jdhgdig/fosabiwonowiw.pdfIn PDF document text
- https://cdn.sqhk.co/dubagelojuwe/PhgTagg/lagevofazolel.pdfIn PDF document text
- https://s3.amazonaws.com/gurowozenupifi/buruluzajuketunazenu.pdfIn PDF document text
- https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/1632519.pdfIn PDF document text
- https://s3.amazonaws.com/jeromisixinolib/21021144378.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://seroroxunabolu.onlinewebshop.net/pafalepemowoxuwo.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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000de87.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE87 | 5688 bytes |
SHA-256: 4fc3e21be28f1a6672f2840ec2aaae8988e88984929c13b4b0d8895b46969ed3 |
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font_01_sfnt_off0000f1f9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1F9 | 9920 bytes |
SHA-256: 029cecafcd8a17ebbf6df18473891f0d80c048c4567bd436334d385e49d66cd2 |
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