MALICIOUS
136
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to a redirector URL (https://ponafet.ru/wix?keyword=biology+chapter+11.1+worksheet+answers), suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to 'Biology chapter 11.1 worksheet answers', indicating a lure to attract users seeking educational content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support the conclusion that this document is designed to redirect users to potentially malicious or spam-related websites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 5
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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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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://ponafet.ru/wix?keyword=biology+chapter+11.1+worksheet+answers PDF link annotation
- https://static.s123-cdn-static.com/uploads/4418991/normal_5ffac4b4a4c69.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500430/normal_60490c13c365e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378393/normal_6044227415949.pdfIn PDF document text
- https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/256855.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404116/normal_604cc1c05ebb0.pdfIn PDF document text
- https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/1348158.pdfIn PDF document text
- https://tagewojozupuk.weebly.com/uploads/1/3/4/3/134358966/2742602.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383582/normal_6035c4c95cc72.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/dusined/82719041977.pdfIn PDF document text
- https://s3.amazonaws.com/kiwopusafize/any_video_converter_software_for_android_mobile.pdfIn PDF document text
- https://s3.amazonaws.com/bikikanafopavu/8914498834.pdfIn PDF document text
- https://s3.amazonaws.com/wizuluworafid/how_to_invest_in_penny_stocks_for_dummies.pdfIn PDF document text
- https://s3.amazonaws.com/bulalowisu/bruner_s_constructivist_theory.pdfIn PDF document text
- https://s3.amazonaws.com/kiguteperilodu/chhello_divas_720p.pdfIn PDF document text
- https://s3.amazonaws.com/buwosevax/65951676953.pdfIn PDF document text
- https://s3.amazonaws.com/galinikagopit/fesujik.pdfIn PDF document text
- https://s3.amazonaws.com/viregujipowuru/19765258079.pdfIn PDF document text
- https://s3.amazonaws.com/dotivaf/audio_cutter_and_merger_free.pdfIn PDF document text
- https://s3.amazonaws.com/lokijuronig/microsoft_edge_browser_for_windows_7.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_off0000e700.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE700 | 5584 bytes |
SHA-256: aeefef5120dafcc5af2b311cec0f96247991b60f367b3f6f173a78ca915b43c3 |
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font_01_sfnt_off0000fa23.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFA23 | 11068 bytes |
SHA-256: d45c28c3464c6a9e61c881bd2a3d308c9192ebd4bd09b0da222f1449c526428a |
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