MALICIOUS
214
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik'. The document body, though heavily obfuscated, contains text related to 'Five nights at freddy's 2 free download pc', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, one of which is 'https://s3.amazonaws.com/kesumasaka/sold_by_patricia_mccormick.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
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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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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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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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://yafferge.ru/strik?utm_term=five+nights+at+freddy%2527s+2+free+download+pc In PDF document text
- https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/7329645.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376357/normal_5fe7aea4aa14e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417137/normal_604909c648a07.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372963/normal_600b55e99d595.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463264/normal_602dd5d983675.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375716/normal_5fe892486c0b6.pdfIn PDF document text
- https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/4935680.pdfIn PDF document text
- https://venofizemebesok.weebly.com/uploads/1/3/2/6/132681219/a477c9402.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/kesumasaka/sold_by_patricia_mccormick.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51f3d729-a088-4494-a031-46764dd23c59/10320598653.pdfIn PDF document text
- https://s3.amazonaws.com/xenavuxa/34502187882.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6ba70af-1461-4eed-88c3-15039d9f375c/tomagasamugupijere.pdfIn PDF document text
- https://s3.amazonaws.com/pazatuv/wanderer_above_the_sea_of_fog_critical_analysis.pdfIn PDF document text
- https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_27aa171a1dfe413cacfce2a586d9b190.pdf?index=trueIn PDF document text
- https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_0ee11c4005764111825aacba8a027a1f.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/lunojol/webewizezojebalim.pdfIn PDF document text
- https://s3.amazonaws.com/fidefofudi/james_patterson_new_releases_october_2020.pdfIn PDF document text
- https://s3.amazonaws.com/rolefosiju/sds_sheets_for_clorox_disinfecting_wipes.pdfIn PDF document text
- https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_ac37afa6786a49428302843c6218b1e8.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/3badc4d7-6248-425e-ac73-1792972b59b2/centerpoint_4x16_scope_review.pdfIn PDF document text
- https://s3.amazonaws.com/xugigabitulu/paul_fussell_class_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db3bdc80-7bf9-4b7f-941f-f7ce312c13e0/ap_style_partial_quotes.pdfIn PDF document text
- https://s3.amazonaws.com/davubewu/dls_all_team_original_logo._zip_2019.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_off0000ec59.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC59 | 5792 bytes |
SHA-256: 212bec3a453d34b6a4b10b88b1a10af779743d40105c727764727a3dff988469 |
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font_01_sfnt_off00010041.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10041 | 10980 bytes |
SHA-256: c13ad83d8cac7a6eadd5378d529a42b7e677156b5b8b89984d7c23396dd154ce |
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