MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, with a primary URL pointing to a domain associated with SEO link farming and phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically flags the main URL as an SEO redirector for a 'free-download phishing' lure. ClamAV also detected this as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the structure and heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.
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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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://pelibifir.ru/award?keyword=biology+dictionary+pdf+free+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4410199/normal_601cc16e3f44a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369907/normal_603a2a45020af.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424666/normal_602995cbcf661.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386824/normal_601421b48b80c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402960/normal_601eb15b4565f.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/xewamejixolefaj/73082540449.pdfIn PDF document text
- https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_8de7ce05f61045688a5d1dcb6ea43b86.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/setikizo/facebook_for_pc_windows_8._1.pdfIn PDF document text
- https://s3.amazonaws.com/sagotomagin/is_there_going_to_be_a_sequel_to_scary_stories.pdfIn PDF document text
- https://s3.amazonaws.com/nafibanefexex/brinks_home_security_control_panel_manual.pdfIn PDF document text
- https://s3.amazonaws.com/polexebuj/diagrama_de_flujo_formato_arquitectonico_ejemplo.pdfIn PDF document text
- https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_3800b4becc6d49f9aa53a0b00b53e478.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bifadiwuwileji/vewon.pdfIn PDF document text
- https://s3.amazonaws.com/jotogorurekuro/12909122017.pdfIn PDF document text
- https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_3c7cc1e2435648a2b586c3dd9a31f423.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/regovadeje/xixanazuro.pdfIn PDF document text
- https://s3.amazonaws.com/jirebonudur/body_champ_cardio_dual_trainer_owners_manual.pdfIn PDF document text
- https://s3.amazonaws.com/topipovikapari/graphing_exponential_functions_with_transformations_worksheet.pdfIn PDF document text
- https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_f7485271f07643e99b81b2a0caa5fde3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rowubunak/bapuropiwixeponusurifu.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_off0000edff.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDFF | 5388 bytes |
SHA-256: c1c25ccb672d75f90b7367836ca24c7536d9534a6843097292570a4191cbfc2f |
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font_01_sfnt_off0001007f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1007F | 10440 bytes |
SHA-256: 658fcb9ad1ca3dd4f690653ae7ba55a83c675b07ecc2938475ee9423b6644140 |
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