MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of a malicious ML classification and ClamAV detection further supports its malicious nature. The document body, though heavily obfuscated, suggests a lure related to 'worksheet key', which is a common tactic for phishing or distributing further malware. The embedded URLs are likely used to redirect users to malicious sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
Heuristics 5
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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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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://trafftec.ru/123?utm_term=abiotic+vs+biotic+factors+worksheet+key PDF link annotation
- https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/7813355.pdfIn PDF document text
- https://vovufopoxin.weebly.com/uploads/1/3/4/4/134466437/sanazigi.pdfIn PDF document text
- https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/miguboz_gesupimeju_bapozotod_pazotirugijixe.pdfIn PDF document text
- https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.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/wanasuvedigo/62148459215.pdfIn PDF document text
- https://s3.amazonaws.com/zusevamasor/fibexaxuwavinekigifudagik.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b1e4a278-0d26-472c-8363-3010fb647862/mutanogef.pdfIn PDF document text
- https://s3.amazonaws.com/fasanag/wopokiv.pdfIn PDF document text
- https://s3.amazonaws.com/xalasawu/wujedakeg.pdfIn PDF document text
- https://s3.amazonaws.com/muxozuvalubi/my_kindle_app_won_t_books.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_off0000a822.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xA822 | 5384 bytes |
SHA-256: b1d683029a008f82fbf66e56655dabe6c9071cca301e479e296a0665262e66f7 |
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font_01_sfnt_off0000ba91.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBA91 | 9944 bytes |
SHA-256: 8a454fb226ab4aff08bb431ef48b47bc4179fd2acf71d8a76ebefef9161bab8c |
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