MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains keywords related to "June 2014 bio regents answers" and the authoring application, indicating a lure to external content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
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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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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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://soxebez.ru/wix?keyword=june+2014+bio+regents+answers PDF link annotation
- http://antonioit.space/aprendizajes_clave_biologia_secundariaq9olj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4491412/normal_606485679618f.pdfIn PDF document text
- http://alcexpress3.xyz/9538375459lu557.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402724/normal_601b99919b42c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466367/normal_5fd24d7ba14f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365601/normal_6056db505b2d0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489032/normal_5fcd6d36b17ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427105/normal_60520ea454130.pdfIn PDF document text
- http://uscovidcharts.com/55262739394qcdyb.pdfIn PDF document text
- http://andyhongdigital.com/artritis_reumatoide_2016f7wou.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365602/normal_5fed0378bf684.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_8871676e2b484cc1bd7bc2694611afee.pdf?index=trueIn PDF document text
- https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_dab3da29d7db471aa1223fc231482c8e.pdf?index=trueIn PDF document text
- https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_56586b5699c44ada8fa58f1b7453ac76.pdf?index=trueIn PDF document text
- https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_b5be60def6b24db19887fef317f8538d.pdf?index=trueIn PDF document text
- https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_13af9e52b4f4452082448cc94c319332.pdf?index=trueIn PDF document text
- https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_0b54edc24913413bb8e08bb07023bb7f.pdf?index=trueIn PDF document text
- https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_be456a5bb04a482181db54b8285962e4.pdf?index=trueIn PDF document text
- https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_7986b4d3143d4da1bdf98b8f46a7a319.pdf?index=trueIn PDF document text
- https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_abc0382e1db64038bfef5f73ffff2f9f.pdf?index=trueIn PDF document text
- https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_16cda00ad78e4f36990bacfc3b3ad74b.pdf?index=trueIn PDF document text
- https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_d3cf265dd2714bdfb8251722697e2c83.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_off0000ce90.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCE90 | 5456 bytes |
SHA-256: 7ca9ec9758f4f863719488ea43fadd0d499aad803f96292cd9faf2bc69c84f08 |
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font_01_sfnt_off0000e148.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE148 | 10432 bytes |
SHA-256: 455fd9e5fc8a0805ea0c5e330845711e8c25b25873fd4d5f3706d98fbb8014c0 |
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