MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, many of which point to a link farm designed to redirect users to potentially malicious sites. The primary URL identified, 'https://ponafet.ru/strik?utm_term=how+to+perform+a+transesophageal+echocardiogram', is flagged as suspicious and is presented as a lure for a free download. ClamAV and ML classifiers also indicate malicious content, consistent with a phishing or malware distribution campaign.
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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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/strik?utm_term=how+to+perform+a+transesophageal+echocardiogram PDF link annotation
- https://cdn.sqhk.co/jegivoziba/gejfgfL/el_camino_de_santiago_self_guided_tours.pdfIn PDF document text
- https://cdn.sqhk.co/rabataxuvax/jbYgMhg/dujavezokewakupo.pdfIn PDF document text
- https://cdn.sqhk.co/vulovosovem/cetYgfx/growtopia_wiki_crystal_recipes.pdfIn PDF document text
- https://cdn.sqhk.co/mudemodox/Oricnhh/tuberculosis_symptoms_death.pdfIn PDF document text
- https://cdn.sqhk.co/ralapogifur/ePXjaPP/woparuzalafivomepuku.pdfIn PDF document text
- https://cdn.sqhk.co/kelopifagisu/3U4ZyTm/rugutekiziwesuto.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://s3.amazonaws.com/baxekojojexusol/xijiboz.pdfIn PDF document text
- https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_f2366b2e57e9434781fb142aad7a7158.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xomepixo/dokulejur.pdfIn PDF document text
- https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_67a83a98cc0341a09ca0e14b7f7ac100.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/zurovajij/4379847404.pdfIn PDF document text
- https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_bb42b02aae4a4d788cc3fe7592f4bd29.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bidivo/bbc_radio_4_any_questions_any_answers.pdfIn PDF document text
- https://s3.amazonaws.com/ginutu/consent_letter_format.pdfIn PDF document text
- https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_0bc14063bbdb43c7903339c80271d43e.pdf?index=trueIn PDF document text
- https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_bee10bf36f124025a6c93344db6965ee.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xuvamuba/aladdin_2019_ost.pdfIn PDF document text
- https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_bf4fd0939a5041fd87c169306a7dfd07.pdf?index=trueIn PDF document text
- https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_34b63f660d1544e1aaf4aae7262d4bb8.pdf?index=trueIn PDF document text
- https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_502bb0d180234521a983633f9a2d3125.pdf?index=trueIn 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_off0000ecff.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECFF | 5412 bytes |
SHA-256: 53613f14d31158ff41383d64d6fdbd7a40a637fbb2424b521e30411734ea4690 |
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font_01_sfnt_off0000ff37.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFF37 | 10472 bytes |
SHA-256: befe205ebbb682d3e0e7ebc0543d8ed10b394b74646325b97057765682e734f6 |
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font_02_sfnt_off00012318.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12318 | 4324 bytes |
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361 |
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