MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users. The primary redirector URL is https://jacksth.ru/strik?utm_term=dog+rectal+temperature+labor, which is flagged as a high-risk indicator for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
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://jacksth.ru/strik?utm_term=dog+rectal+temperature+labor PDF link annotation
- https://cdn-cms.f-static.net/uploads/4456660/normal_6051c3ad2bf9c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370278/normal_5fe0614a65927.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446497/normal_60006a6677a56.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382960/normal_60026ea16c7fa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476946/normal_601c62609af4d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375885/normal_606c45964f152.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425912/normal_5fd8c0beb65b7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501233/normal_5fdf11879b461.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478667/normal_605685f54a8a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385415/normal_5fe90ea261766.pdfIn PDF document text
- https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/konikeji.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366359/normal_5fdf2fdeca0c7.pdfIn PDF document text
- https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/b2a0ce2da724.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/rikolesafuwofar/53165957523.pdfIn PDF document text
- https://s3.amazonaws.com/tafogusegabomu/justin_bieber_boyfriend_song_djjohal.pdfIn PDF document text
- https://s3.amazonaws.com/makumapikeze/the_long_haul_movie_free.pdfIn PDF document text
- https://s3.amazonaws.com/xirixepo/citroen_c3_aircross_brochure.pdfIn PDF document text
- https://s3.amazonaws.com/wulagisi/definition_classroom_action_research.pdfIn PDF document text
- https://s3.amazonaws.com/matogapibelifiv/necromancy_5e_guide.pdfIn PDF document text
- https://s3.amazonaws.com/tirimofufemukat/new_telugu_christian_devotional_songs_free.pdfIn PDF document text
- https://s3.amazonaws.com/bugutaj/ipu_btech_result.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_off00014034.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14034 | 5216 bytes |
SHA-256: cc6c2ac3270d41c63a78cf3d37f679c4f3e0bfddbef36cfc430b337f87e0431b |
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font_01_sfnt_off000151e2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x151E2 | 11544 bytes |
SHA-256: b0d015f410885a29d181864f05a25462046be56be4e0c961309310a1d81adc3f |
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