MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets, combined with metadata from wkhtmltopdf, indicating it was likely generated programmatically to appear as a legitimate document.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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/123?utm_term=subordinating+conjunctions+worksheet+free PDF link annotation
- https://cdn.sqhk.co/vepanoxubere/iduEcid/classifying_chemical_reactions_worksheet_page_9_answers.pdfIn PDF document text
- https://cdn.sqhk.co/jifigetuxu/dPHjdQW/toralev.pdfIn PDF document text
- https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/mapinuwew.pdfIn PDF document text
- https://cdn.sqhk.co/gusoguribus/WKonhet/95957614493.pdfIn PDF document text
- https://cdn.sqhk.co/vezubusevof/ggAqVif/chyawanprash_arjun_kapoor_song.pdfIn PDF document text
- http://modozadubop.mywebcommunity.org/bibelot_dfinition.pdfIn PDF document text
- https://cdn.sqhk.co/woteruzid/QWHhcY5/road_champs_1987.pdfIn PDF document text
- http://wuramegojuluz.mywebcommunity.org/tabla_de_alimentos_ricos_en_fibra_soluble.pdfIn PDF document text
- http://tunewejewuz.mypressonline.com/muvakujovudoliz.pdfIn PDF document text
- https://misapunuzure.weebly.com/uploads/1/3/1/6/131606411/d9ac32e043.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_8c605dedaa874d7aa787d9ab4f13e679.pdf?index=trueIn PDF document text
- https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_e981c05ce88f47e0915ba86f386e8836.pdf?index=trueIn PDF document text
- https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_43c7644a2c4f487b88830dd51d9cd94a.pdf?index=trueIn PDF document text
- https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_906e74e64bf94d29bfe8e3fc145f196e.pdf?index=trueIn PDF document text
- https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_57bef84fe4fd4371865eb386131a9c0c.pdf?index=trueIn PDF document text
- https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_9af42c8837cd41409784868d5ebb8770.pdf?index=trueIn 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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dda6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDDA6 | 5608 bytes |
SHA-256: 6919d1f1ce5de1f48fab51dbf57cefae5d19b0d9de79a1e0b8ffc913926615bd |
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font_01_sfnt_off0000f0bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF0BF | 11136 bytes |
SHA-256: 4bd8ea53f9eb137d772f29664aa08915075aa4d97a75fc51768b61736a185ca4 |
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font_02_sfnt_off000116be.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x116BE | 4324 bytes |
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176 |
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