MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of external links, many of which are SEO-like, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to GRE physics practice questions, aiming to trick users into visiting malicious URLs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9995
Heuristics 5
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://trafficel.ru/123?utm_term=gre+physics+practice+questions+with+explanations+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4409421/normal_5fad314187879.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366009/normal_5f98dcd87d5b2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4504922/normal_5fad77cdcbca3.pdfIn PDF document text
- https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/madovisuzudoni-jijijaji-ladovetalota.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/mijedusovineti/80540633112.pdfIn PDF document text
- https://s3.amazonaws.com/vovopafubipu/funky_town_lucky_chops_sheet_music.pdfIn PDF document text
- https://s3.amazonaws.com/musoxifuvitalo/create_new_sheet_in_excel_vba_macro.pdfIn PDF document text
- https://s3.amazonaws.com/viromibukoleliw/tugugun.pdfIn PDF document text
- https://s3.amazonaws.com/zoromexemuzid/tes_spanish_comparatives_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/jiwotarotavuz/lasuxerotisatetudix.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_off0000d438.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD438 | 5660 bytes |
SHA-256: 3652651692beeca7915685870d637f3ed9fb2c112a53b8bf23a362acb84ce5d4 |
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font_01_sfnt_off0000e793.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE793 | 10596 bytes |
SHA-256: 369d599c542ececc13d97cb725ffe28243b0c9fc2ebd8e30d45bcd5821235927 |
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