MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains keywords related to a quiz, indicating a lure to encourage clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a link farm heuristic further supports malicious intent, likely to redirect users to malicious content or phishing pages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 7
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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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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://leonvi.ru/wix?keyword=ionic+bonds+quiz+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4447095/normal_6020003ef0ae2.pdfIn PDF document text
- http://penibibujobufux.iblogger.org/picsart_mod_apk_gold.pdfIn PDF document text
- https://cdn.sqhk.co/pelotuwew/GMLUqjg/70976670525.pdfIn PDF document text
- https://fodukajanewirom.weebly.com/uploads/1/3/5/3/135383911/xewam-wuzaxigakol-gofeta-neguporovedozi.pdfIn PDF document text
- https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/c7933397937f6f.pdfIn PDF document text
- https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/zujikipagedef.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485163/normal_6000a132d8737.pdfIn PDF document text
- https://gutamigev.weebly.com/uploads/1/3/1/1/131163772/cdd5146c22.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456116/normal_5fde63509be34.pdfIn PDF document text
- https://cdn.sqhk.co/gejemizus/YgdijTB/felolabadabosemomegudeve.pdfIn PDF document text
- https://cdn.sqhk.co/rerunagakiz/jfQeifP/54701497032.pdfIn PDF document text
- https://cdn.sqhk.co/futevanu/jeCF391/81240777497.pdfIn PDF document text
- https://buvelixajotoneb.weebly.com/uploads/1/3/5/9/135982000/rivafomoju.pdfIn PDF document text
- https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/wufebeje-jeguxowopabuxi.pdfIn PDF document text
- https://cdn.sqhk.co/sifajoxojif/jbw5CQw/bivesevidimozixivodid.pdfIn PDF document text
- https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/6104141.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kefefetafij/30369120770.pdfIn PDF document text
- http://jirovod.rf.gd/business_plan_format_for_restaurant.pdfIn PDF document text
- http://bugelinuxobeva.epizy.com/najasilamule.pdfIn PDF document text
- https://s3.amazonaws.com/polojuliragam/top_10_android_games_on_play_store.pdfIn PDF document text
- http://vetoraj.rf.gd/affairscloud_january_2019_pocket.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_off0000d5db.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD5DB | 5244 bytes |
SHA-256: 9cde5fdfb239ca97849055cd4c5c9e522b719b506394009bc6860edc56125db5 |
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font_01_sfnt_off0000e7d3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7D3 | 10076 bytes |
SHA-256: 40d477f5b23ba8c3774495bdb3fa7797614b23608153a2d38abf0973c676ce0d |
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