MALICIOUS
254
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical ClamAV detection. The embedded URL 'https://yafferge.ru/123?utm_term=bangla+song+album+video' is identified as a malicious redirector, likely used to funnel victims to a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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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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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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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=bangla+song+album+video In PDF document text
- https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/8d074.pdfIn PDF document text
- https://cdn.sqhk.co/xojelumegasi/hfsiaii/35449418547.pdfIn PDF document text
- https://cdn.sqhk.co/zijigemeworu/lgejjlS/yellow_pages_phone_number_reverse_lookup.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4386333/normal_6003a1561c2dc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379369/normal_5ffb408e2aa55.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369646/normal_604f57a9dce6d.pdfIn PDF document text
- https://cdn.sqhk.co/navotezive/hirUies/nba2k20_locker_codes._org_vc.pdfIn PDF document text
- https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/445212.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455375/normal_6041836d14897.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/49a0011b-b459-473f-aff1-5e160e630e8d/sermones_adventistas_en_power_point_para_predicar.pdfIn PDF document text
- https://s3.amazonaws.com/watajive/advanced_search_techniques.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f2e122e2-285b-4a97-b473-b9e8e59c82e8/sijagilofolizoxaraf.pdfIn PDF document text
- https://s3.amazonaws.com/jeduzizonox/how_to_write_a_case_summary_for_court_uk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/064d5de8-b3d7-4b98-bbc0-506b38eb1ed2/intellichlor_chlorine_generator_inspect_cell.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b169a3ad-9bbb-4e75-881f-338f538861ac/skyrim_how_to_meet_the_dark_brotherhood.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3ec876e2-5be5-493d-8b5a-3623c93cc485/43665480892.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/74ee1582-9628-46a5-9901-62a5f88d097a/30925770496.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1192f623-a98c-422b-b66b-e8ad393c548c/sofibemuvunivuwizuza.pdfIn PDF document text
- https://s3.amazonaws.com/fowonaxul/arere_manase_song_ringtone.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_off0000db73.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB73 | 5300 bytes |
SHA-256: 7c2fde13109f63a649fb8a72644f00e253c75853eae4fadc31445f5f1d089a23 |
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font_01_sfnt_off0000ed6f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xED6F | 10932 bytes |
SHA-256: c20977ccaff4a08e75c2489ebf5896141b54296e0270473fc85331c3f85215c0 |
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