MALICIOUS
192
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/123?utm_term=free++antivirus+avira+terbaru+full+version'. Additional heuristics indicate it's a link farm on disposable hosting and that it's flagged by an ML classifier as malicious. The presence of a download button lure further supports a malicious intent, likely to trick users into visiting the malicious URL.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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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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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 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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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/123?utm_term=free++antivirus+avira+terbaru+full+version In PDF document text
- https://static.s123-cdn-static.com/uploads/4473375/normal_5ff61bd840f0f.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4369165/normal_60b002196be61.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381737/normal_600b9dfa971f4.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://uploads.strikinglycdn.com/files/c71bc11c-8309-46fc-8a6f-58cbcb57dea8/practical_english_usage_swan_4th_edition.pdfIn PDF document text
- http://palixazoke.pbworks.com/f/wuvagegakinovoja.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa1dde7c-fe29-4e5d-b8c0-7df1bbd9cbf2/who_has_the_best_incentives_on_new_cars.pdfIn PDF document text
- http://wamotarirup.pbworks.com/f/67864825213.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3c1de4e9-a4a9-4986-9ac2-f176fae1ca79/what_is_the_corporate_identity.pdfIn PDF document text
- http://tijigika.pbworks.com/w/file/fetch/144513297/20938818219.pdfIn PDF document text
- http://jolunatimavu.pbworks.com/f/pixolubabona.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b4218d01-2e9c-4785-b317-b290cad6411d/blacksmith_classes_south_carolina.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7a978a6e-c03e-4518-9bcd-84e4a1647073/depafatigumetovubigob.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d649966-5442-4f48-9c74-1d821cc6bd73/naxowomum.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24683631-f007-4b09-9e71-de534a5c7052/hp_2542_printer_ink.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d7edf62-938b-4e3a-97e6-52b8139e6e5f/65122652194.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fe36fb7e-cce1-4020-82c9-5178b1ba88c2/pafemiwerag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/37447f8e-03ec-4712-aa3d-92bc9be61971/royal_canin_maxi_puppy_wet_food_feeding_guide.pdfIn PDF document text
- http://ziriwuru.pbworks.com/f/2008_harley_davidson_electra_glide_classic_battery.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e6ed.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE6ED | 4800 bytes |
SHA-256: c9ef93c9d810107f997b339dd2432301b3c51ce7205b734d368dd593e08dd041 |
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font_01_sfnt_off0000f74c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF74C | 10936 bytes |
SHA-256: 4e6975ee42a4ef131ca14fb6e66c82eaafbf392667d33655849d6fd3586b7e9e |
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font_02_sfnt_off00011ce5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11CE5 | 4324 bytes |
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333 |
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