MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users. One prominent URL, 'https://xajibur.ru/strik?utm_term=what+pump+do+i+need+for+a+presta+valve', is identified as a redirector, suggesting it leads to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of numerous links and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest a campaign to drive traffic to malicious sites.
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://xajibur.ru/strik?utm_term=what+pump+do+i+need+for+a+presta+valve PDF link annotation
- https://static.s123-cdn-static.com/uploads/4423195/normal_60061559742e4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4393898/normal_5fcb2b7c72423.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415754/normal_5fdd9c8fd93f1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4480148/normal_5fde35931e4c6.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://namerunu.rf.gd/appeal_letter_template_for_dismissal.pdfIn PDF document text
- http://dekefolujif.epizy.com/apply_update_from_adb_android_system_recovery.pdfIn PDF document text
- https://s3.amazonaws.com/zedilegol/template_ecommerce_bootstrap_premium.pdfIn PDF document text
- https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_d5b7bd47658e40bf9eb3281278e463cc.pdf?index=trueIn PDF document text
- https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_f38b4442b4bc4affa5edc865ec31b361.pdf?index=trueIn PDF document text
- https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_f3af7bd61ad1436aa393054747c1a696.pdf?index=trueIn PDF document text
- https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_a5f7243d04fd4fdf9f11a23a1829afcf.pdf?index=trueIn PDF document text
- https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_e98e157f45144c16bf9adeae426587ff.pdf?index=trueIn PDF document text
- https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_1d9d0daafc48417f8ceb69515aca6a5a.pdf?index=trueIn PDF document text
- https://7b6eef9a-7352-448c-8e80-911c5f2e1c0b.filesusr.com/ugd/f34323_311d17c87beb42229c6e7847aba7325c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vanatul/rokujisudazogepinovok.pdfIn PDF document text
- https://s3.amazonaws.com/jovekus/kubuwewexonabisuwafo.pdfIn PDF document text
- https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_1e323bdb47c34479a8bdcdc3a20af537.pdf?index=trueIn PDF document text
- https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_a3a5ca2ff148436bb0b5a2ee7aa26ed6.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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f1d3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1D3 | 5356 bytes |
SHA-256: d3087fbe7651fa0e765bd4a0cbedb4f89ec8ac2c4305f31f040624df66e6c79c |
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font_01_sfnt_off000103f2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x103F2 | 10768 bytes |
SHA-256: 51444e5849d68800a32ffb6ff50830628d781cb96b7a2b7237c2a7f37483d723 |
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