PDF malware analysis — malicious · 6b8ea27dc41b749a

MALICIOUS

PDF

79.2 KB Created: 2021-03-17 15:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: aab5cc084c2a6312b574751a5ea92528 SHA-1: 5f520dcf3619e413e64302b530130c2f7a17c857 SHA-256: 6b8ea27dc41b749ad17333b23011a776e48dd26d4abffabc0af399e740ded452

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary external URI points to 'https://vilenefex.ru/wix?keyword=south+park+wrestling+full+episode', which is likely a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small 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.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The 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.
Embedded URL info EMBEDDED_URL

One 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://vilenefex.ru/wix?keyword=south+park+wrestling+full+episode PDF link annotation
- http://fisareboveda.getenjoyment.net/how_to_administer_the_ssi-4.pdfIn PDF document text
- https://cdn.sqhk.co/woxemumi/wuJSjb4/90874775025.pdfIn PDF document text
- http://zoxuruje.sportsontheweb.net/26391026731.pdfIn PDF document text
- https://sulovuve.weebly.com/uploads/1/3/5/9/135973568/d7b051dd7.pdfIn PDF document text
- https://cdn.sqhk.co/fexilejedit/hbjfJgi/jurassic_tribes_mod_apk_1._2._11.pdfIn PDF document text
- https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/lijibe_ruvitojafi_nuvevopot.pdfIn PDF document text
- https://cdn.sqhk.co/wejupexuput/DHogfid/guess_the_emoji_answers_pictures.pdfIn PDF document text
- https://cdn.sqhk.co/lilanoto/QKihjac/gravity_separation_definition_chemistry.pdfIn PDF document text
- https://cdn.sqhk.co/migazajigum/ybhbsZa/51143540290.pdfIn PDF document text
- http://fodosokidorakig.22web.org/biodata_format_for_teaching_job.pdfIn PDF document text
- https://nutipofuvi.weebly.com/uploads/1/3/5/3/135310868/nixozoneno_majaret.pdfIn PDF document text
- https://cdn.sqhk.co/merabuvi/ggfqjeg/fenevevepomobi.pdfIn PDF document text
- https://cdn.sqhk.co/ranemagesoga/CSbhgNT/16582474447.pdfIn PDF document text
- https://cdn.sqhk.co/gexopoku/gfKD3eI/84726278969.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_b5fec8bf15c44b779d7d0e4813d2b4d8.pdf?index=trueIn PDF document text
- http://nuwadolonopip.onlinewebshop.net/shunt_capacitor_compensation.pdfIn PDF document text
- http://jolijugidepim.rf.gd/bikini_body_guide_free_download.pdfIn PDF document text
- http://pegewolonu.rf.gd/malt_lymphoma_guidelines.pdfIn PDF document text
- http://dafemekadur.epizy.com/37045278115.pdfIn PDF document text
- http://luvabokinoleg.onlinewebshop.net/biwolezom.pdfIn PDF document text
- http://megisaduvivegi.epizy.com/kiwovoletuzubido.pdfIn PDF document text
- http://jibimom.myartsonline.com/perspektif_liberalisme.pdfIn PDF document text
- https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_815ff7a22a5a4c32b0888212bdef2a03.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_off0000f87a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF87A	5560 bytes
SHA-256: `076f18adc99f80935c5814c5c791e05e6ccb789293644fd40f9315fd1f35046f`
`font_01_sfnt_off00010b6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B6B	10624 bytes
SHA-256: `9aa432165c9e31fa95d1d5db47717229e85dd1be6276dc5e0c124388e3501cd8`

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